Absolutely true in my experience. The fact that you had to go out of your way to get alcohol in high school made it natural to then take that alcohol and get as screwed up as possible. I still enjoy drinking, but I gave up drinking like that shortly after turning 21, which I suspect is true for many people here.
As an aside, what is up with Wisconsin? It seems to be the norm there for guys to knock down 12 or so frosty ones a day. I had a buddy from there who kept that pace and was blown away to hear that his whole family, grandfather on down, kept it with him.
