I thought Rivers was pretty good at Duke. My memory for such details sucks, though... : { But, that wasn't my point, really. You could easily argue that Brogdon was the best of the three, but no coach in america would have known that or chosen him over Rivers if they were 'selecting' out of high school.
Either way, i think knowing what we know now, i'd take 4 years of Brogdon over the one year of Rivers or 4 of Cooney. But, that's just in hindsight. So, yeah, you can get an amazing player in the bottom 50 or outside of the top 100 HS kids. But, that's, as they say with baseball prospects, "a lottery ticket." I wouldn't want to make my career as a coach relying on that level of player with any kind of consistency. Which, to me, makes the accomplishments of certain coaches all the more remarkable.