In fact a number of studies have shown that 60-90% of Christian kids lose their faith in college. (For just one example, see the 2006 Barna study entitled; "Most Twenty somethings Put Christianity on the Shelf.")
It happens all the time. That’s what the numbers say, and the numbers don’t lie.
One big reason why is because the environment at most colleges in the United States and Europe is EXTREMELY HOSTILE TO CHRISTIAN BELIEF.
This really shouldn't be much of a surprise, since THE TYPICAL COLLEGE IS FULL OF EDUCATED LIBERALS WHO LOATH WESTERN CULTURE AND DESPISE CHRISTIANITY.