I think Europe has pretty much surpassed the US in youth development in many regards.
Our young players would be better served by playing professional basketball with grown men at age 15-17 rather than playing AAU ball and being coddled so much in HS and college.
And somehow, the system doesn't produce more players capable to function in the NBA than the NCAA. Arguably, it probably produces less, given that the large majority of high European draft picks since, say, 2005, have been flops.
LOL - obviously, such an assertion cries out for test!
Let's stick with lottery picks (top 14).
2005 Fran Vasquez(11) & Yaoslav Korolev(12). Vasquez proved to be a 'bad pick' by Orlando mainly in that he decided
after the draft to stay in Europe, p---ing off Magic fans. But not, technically a flop due to being a bad player. Korolev was a Donald Sterling special. There are some weird circumstances around the way the Clippers handled him, but let's just call him a flop. 1 of 2 *
2006 Andrea Bargnani(1), Mouhamed Sene(10) & Thabo Sefolosha (13). Bargnani has certainly not played up to #1 billing, but he has at least been an 'adequate' NBA player. He had a couple of really good years with Toronto. His problem has mainly been staying healthy, not ability. Thabo has been solid. Sene qualifies as a flop. 1 of 3
2007 Yi Jianlian (6). Flop. (Note - Bellini was picked at #18, outside our range). 1 of 1
2008 Danilo Gallinari(6). Not a flop. 0 of 1
2009 Ricky Rubio (5). Hmmm... very debatable ... let's go with 'flop'. Some will disagree. 1 of 1
2010 No non-NCAAs in the top 14. Udoh and Aminu played in the NCAA. 0 of 0
2011 Enes Kanter (3), Valanciunas (5), Vesely (6), Biyombo (7). I know some will more aggressively label more or all of these guys busts, but in reality, compared to their draft slots, by games, minutes played & win shares, Vesely is the only one who is in the 'flop' territory. And even his production hasn't been a complete disaster. 1 of 4
2012 No non-NCAAs in the top 14. Fournier was taken #20. 0 of 0
2013 No non-NCAAs in the top 14. Giannis (15), Nogueira (16) & Shroder (17) all taken just outside. 0 of 0
So since 2005 that is 5 of 12 non-NCAA players taken that were flops. Some might argue against Rubio and Vesely as flops yet, which would drop that to 3 of 12, but lets go with 5 or 42% (with some large error bars around that).
For NCAA players, I'm not going to illustrate the details, but based on comparative games, mp, & br WS totals, a quick scan gives me flop numbers:
2005 McCants, May, Dioqu. 3 of 10 *
2006 Armstrong, O'Bryant, Williams, Morrison. 4 of 11
2007 Thornton, Wright, Law, Oden. 4 of 12
2008 Randolph, Rush, Alexander, Beasley. 4 of 13
2009 Clark, Williams, Hill, Flynn, Thabeet. 5 of 12
2010 Henry, Aldrich, Udoh, Johnson. Tempted to list Aminu and Turner but will resist. Make it 4 of 14.
2011 Fredette. Knight (yeah, I did that). Probably should include Marcus Morris, but I'll give him a pass. 2 of 10
2012 Marshall, Rivers, Robinson. Waiters (imho) probably belongs but again, I'll let it pass. Royce White slips by, chosen at #16. 3 of 14
2013 Muhammad, Len?, Porter? McCollum? Too early to tell on some of these guys. Noel? I'm betting that at lease two of the 4 question marks busts, so call it 3 of 14 again.
So, for NCAA-produced players, some 32 of 110 were flops, or 29%.
*Note - Webster and Bynum were high-school draftees and not counted in either total for 2005. They were not NCAA products, so the temptation is to add them to the 'non-NCAA' total, but they don't meet the spirit of 'mysterious unknown foreign player', either.
So, by this simple subjective scan, yeah, lottery picks from the NCAA have flopped less often than non-NCAA selections, ~29% to ~42%
But the error bars on those numbers are pretty huge and clearly overlapping. If you include Webster and Bynum as 'non-NCAA' players, and argue that the jury is still out on Rubio and Vesely, then the non-NCAA number could be dropped as low as 14%.
Similarly, I very clearly left out several names from the 'NCAA' list that some might consider flops.
I think that over time, given more samples, the 'flop' percentage for non-NCAA picks would likely drop down from 42% to be closer to the 29% of the NCAA picks. I would not be surprised if the 'non-NCAA' rate stayed a little above the NCAA rate, though since the simple fact is that there IS in general less information behind scouting internationals and less information should reduce the efficiency of those picks.
For all intents and purposes, the numbers aren't really all that different. Altogether, I'd characterize lottery picks in general to have about a 1 in 3 chance of flopping. And hey, that's pretty much what this study (1998-2008) kinda shows:
http://www.82games.com/nbadraftpicks.htm