According to the US Census Bureau (2000 numbers; last available), there are, indeed, 52% male and 48% female in the 18-24 age bracket.
There are also, by the government's numbers, 51% female and 49% male who were enrolled in school for that age group. (What was the source for your percentages?) That 3% difference is a little over 363,000 young men. Even if you took a few percentage points of the entire expected-college-age group you wouldn't hit "millions" of young men impacted. (3% of the demo's entire population would be just over 800,000).
Their Educational Attainment figures for the 18-24 demo are interesting; from 'some college, no degree', through AA, Bachelor's and on to Grad or Professional Degree....the gap widens. It would appear that the female students stay in college longer and attain more.
Hmmmmm....might they have earned these numbers, inluding the majority of those undergrad places? Now that the door is open to young women with Moms who remember when it wasn't?
What is it you're looking for from Title IX on the academic side?
Pot....stirring....college....yes, there is a relationship here.....