If I'm completely honest, this above quote is an uninformed guess at best. The fact that acceptances have started to go out means that, yes, your chances of being accepted are not as great as you would have if you submitted earlier (not as many available seats). That said, if you are good enough to be considered a match for the school, the day you submit won't matter. If they like you, they will take you. Therefore the decision rests with you. If you think it is worth it, in that CU sounds like a great place for you to train, then it is worth it to apply, regardless of the time. Last year's class was >180 students; larger than the majority of programs in the country. Therefore a larger pool means, all else being equal, a greater chance of acceptance. So, again, the decision rests with you. No one on here knows any more than you do with regard to your chances at "this stage of the game"