There are people who speed through all prayers believing falsely that the quality of the prayer does not matter.
I strongly disagree. I have seen 5-mystery rosaries done in under 10 minutes and was shocked by what I felt was the sacreligous nature of this and the denial of time to meditate. (When I say a 5-mystery rosary is takes over 45 minutes.)
I deliberately try to slow down these speed prayers, by saying them slower and sometimes I have an effect on the group. I realize that this is a bit disruptive, but hope that the benefit to others outweighs the disruption.
You should seek quality in all your prayers, truly putting your whole heart, mind and soul behind each prayer.
One Hail Mary said with respect and full meaning of each word can be worth more than many speed rosaries.
Pray for these speed prayers that God may touch their hearts and minds and help them understand the difference between quanity and quality and come to seek a deep quality in their prayer life.