I thought I would weigh in on the Polish tradition. This is still operational as of the 1990’s, and I have witnessed it at the Polish parish at Adams St. in L.A., as well. I apologize for the lack of Polish keyboard, so I am not using the diacritical marks, or the nasal vowels below.
The formal greeting is “Niech bedzie pochwalony Jezus Chrystus!” (Christ be praised!)
And the response you get back from the priest is “Na wieki wiekow, Amen.” (For ever and ever amen.)
Sometimes people just leave the phrase hanging “Neich bedzie pochwalony…”
After that, conversation proceeds normally, following the rules of Polish speech, which are very formal. Yes, young people get informal more quickly than others, but your best bet is to remain formal. Preists (ksiadz) are addressed in 3rd person (“the priest”), there is no “you”. Every churchman is “ksiadz” first ,so a bishop is “ksiadz biskup” or “ksiadz kardynal”.
Hand-kissing is reserved for ladies (older ones, that know you, or if they drop their hand on greeting). Men (that know each other) will double-kiss. Every one else will generally shake hands.