While I think your question was for Coach, I am replying anyway.
I always hear about marginal guys like Jamoney "testing the waters" and if they are not first round picks come back to school to "play their way into the first round." The question is: how often does this happen? Last year by my count there were five seniors in the first round (I could have missed some): Law, Thornton, Dudley, Brooks and Almond. The year before there were eight (Shelden Williams, Roy, Foye, Redick, Armstrong, Carney, Ager and Collins). Of those guys, how many would have been first round picks after their junior years? Impossible to know, but likely all but maybe Almond, Brooks, Ager and Collins. Maybe Armstrong on that list too.
So of the last two drafts, maybe five guys "played their way into the first round." I just don't think it is that easy. Even if Jamont has a great senior year, teams may pass on him in the first round in favor of untapped potential (international player, taller player, great scorer, etc). I guess the new age minimum helps the college players, but for the most part the guys who would have gone out of HS are leaving after their freshman years. Jordan at Texas A&M will be a good example. I am not sure he averaged double figures for A&M, but he is 6-11 and likely to go before Kevin Love, who was first team All American.