Since both practices are currently allowed, I think it is fair to say that Catholics are free to make a decision as to which practice they think is more fruitful and efficacious.
I think the following is a very good article
catholic.org/printer_friendly.php?id=31755§ion=Cathcom
Opinion: Fr. Markey on ‘Communion on the Hand’
I encourage parishioners to give prayerful consideration to following Pope Benedict XVI’s lead by receiving Holy Communion on the tongue in the New Year.
…Do you remember last year here at St. Mary’s when we found a Host under one of the pews in the church? I know from other priests that this happens every once in a while in other parishes as well. These incidents remind us that it would certainly be more difficult for people to take the Host improperly if everyone were receiving Holy Communion on the tongue. As the Catholic Church teaches, “If there is a risk of profanation, then Holy Communion should not be given in the hand to the faithful” (Redemptionis Sacramentum, 92).
Many people born prior to the Second Vatican Council will remember when everyone received Holy Communion on the tongue and kneeling. This has been the long held practice for thousands of years (although during certain periods of the early Church it did allow Communion in the hand). While many think that it was Vatican II that called for this change, it is important to note: Vatican II never called for Communion in the hand. Communion in the hand was the result of disobedience which forced the hand of the Church (no pun intended!).
After the Second Vatican Council some dioceses in the world started to make their own rules about receiving the Communion in the hand, disobeying the laws of the universal Church. Witnessing this practice without approval, the Vatican stated that it feared that this disobedience would lead to “…both the possibility of a lessening of reverence toward the august sacrament of the altar, its profanation, and the watering down of the true doctrine of the Eucharist” (Memoriale Domini).
Therefore in 1968 Pope Paul VI graciously sent out a questionnaire to all the bishops of the world asking if there should be a prudent change in the Church’s practice on how Communion would be distributed. The poll numbers came back overwhelming against Communion in the hand. Hence the Vatican concluded: “The answers given show that by far the greater number of bishops think that the discipline currently in force should not be changed. And if it were to be changed, it would be an offense to the sensibilities and spiritual outlook of these bishops and a great many of the faithful” (Memoriale Domini).
Nonetheless the disobedience continued and some of these dioceses petitioned Rome to officially permit Communion in the hand. A year later, in 1969, Pope Paul VI gave an indult to the French bishops permitting each bishop to decide the question in his own diocese (En réponse a la Demande). An indult is a special permission for a particular situation, rather than a universal norm. Nonetheless eventually the majority of dioceses in the world took advantage of the indult and simply permitted the practice.
Why did the Pope allow it? Perhaps it can be best summed up by the words of Our Lord about why divorce was allowed in the Old Testament: “For your hardness of heart Moses allowed you to divorce your wives” (Matthew 19:8). Their disobedience had reached such a point that it would have been difficult to have them return to the traditional practice.
Nonetheless some countries like Sri Lanka did not use the indult, and maintained the long held tradition of receiving only on the tongue. Recently there have also been dioceses around the world such San Luis, Argentina and Lima, Peru that have returned to the traditional practice and no longer permit Communion in the hand. This is an option fully supported by the Congregation of the Doctrine of the Faith.
Furthermore, if one does receive Communion on the hand, there is always the danger that particles may be remain in the hand. The Council of Trent infallibly teaches that Our Blessed Lord is truly present even in the particles as well: “If anyone denies that in the venerable sacrament of the Eucharist the whole Christ is contained under each form and under every part of each form when separated, let him be anathema” (Chapter VIII, Canon 3). For this reason the priest always purifies his hands of particles at the end of Mass, and uses a corporal (a small white cloth meant to catch the corpus, or body, of Our Lord).
Finally another major event occurred this past year when Pope Benedict XVI asked that from now on, all who receive Holy Communion from him must receive It on the tongue and kneeling. I am sure that by insisting on this ancient practice the Pope is trying to foster a deeper respect for the Eucharist as well.
When Rome did give the indult to the French bishops in 1969 it stated, “The new manner of giving Communion must not be imposed in a way that would exclude the traditional practice.” Therefore Communion on the tongue is still the common practice for the universal Church. While both practices are permitted in most dioceses, I encourage parishioners to give prayerful consideration to following Pope Benedict XVI’s lead by receiving Holy Communion on the tongue in the New Year.
All I know is what we did in my church. We knelt at the communion rail with our hands cupped, and the clergyman came down the line and placed the communion wafer in our hands.