i have never verified this, but it was my feeling the AI's are more willing to show up at hi prestige schools. I have recruited quite a few over the years, my experience says if the player is appropriate to the level of the school prestige, the odds of him showing up are very good 75-90%.
2 other annoying AI issues:
1 - in terms of EE, they will act like the class they started in, so if they are very good, the odds of them leaving after playing two or three seasons are higher than normal (just had this happen)
2 - they demand soph playing time their first year of eligibility, even though they have the IQ of a frosh