The religious life in Russia never died, few people managed to bring their faith through all these terrible years. And there were lots of real martyrs during these years. One need great courage to be faithful - you will big problems at your work, for example, if someone sees you going inside the church or baptizing your child. Now the situation changed, most people baptize their children - but many of them do it just because "everyone does it" or "чтоб не болел". So it is kind of people who call themselves orthodox but visit the church twice a year (if so) - to bring "кулич" before the Easter and to take water on Epiphany. And to light a candle. I suppose that the most religious generation in Russia is people of 30-50, those who was young, open and looking for the sense of their living in the epoch of crushing the System. Those who older are too hard to believe, those who younger are the generation of pepsi.