I had to find out for myself so I broke down and picked up a used copy of NCAA 2005 for PS2. I haven't even turned this thing on in over a year so I'm still getting readjusted to the controls but I played the game for almost the entire day yesterday.
It's still early but I played enough games on the XBox to know that there is definitely a difference on PS2 and so far it appears to be a
big difference! I can't believe it but it's almost like EA put out two different versions of the game this year. It's not just the dropped passes, it's like the entire passing game is different. If you play as an option team and hardly pass the ball then you may not notice a difference but I play a balanced offense and I could tell right away that EA must have just tested only the PS2 version and ported it over to Xbox without testing that platform!
As spectralfan says, all of you frustrated XBox owners should try out the PS2 version if you can. The game still has it's problems and it's certainly not worth buying a whole new PS2 console just to play this game. But if you're like me and have both a PS2 and XBox, rent or buy a used copy of the PS2 version and see for yourself.
And don't waste your time trying to fix the Xbox version with the right set of sliders. It cannot be fixed.
And shame on EA for ripping off XBox owners!!