Funnily enough, I read some very similar comments from Jozy on the US system earlier today.
I suppose it's a situation that may improve as the MLS develops.
It's getting better. Back when Landon Donovan was first developing there was a lot less development going on here and soccer had a much lower profile. The kids that are going through the system now will be better prepared to compete at the highest level, and part of that is cdue to the growth of the MLS and increasing scouting in the USA by European clubs.
for US players to really have breakthroughs in the long term means very likely leaving the country earlier and trying to get in big club youth squads in europe wether in england, german or even the ehrendivision (Ajax) at least for those precious last years and try to jump into clubs from there
We have some youngsters doing that, but it also needs to start back here. If the MLS continues to grow in popularity, it will convince more kids to look to a career in football and if we can get a good start to development here in the USA more players will go to Europe with their development already begun.
Immigration will play a role in this - people who come to the US from Europe, Central/South America and Africa bring a passion for football and they make up significant numbers of the MLS fan base. Their kids will grow up watching soccer.
and of course having to adjust to a league dominant playing style can also be quite difficult.. for a pacy,tricks trying player like donavan, the german league with it's slow build up, defensive midfield focused, hard in the fighting playing might have not been the best choice
I think Donovan went to the Bundesliga because it was seen as being not quite as top-tier as the Premier League, la Liga or Serie A, and thus easier to be successful in. Butr in the long rung I don't think he was mentally committed to it, and now he is too old to move. But I agree that I think he'd be better suited to Spain or Italy. England demands a larger stature and Donovan is small, so I'm not sure if he would work there.
A counter example would be Clint Dempsey, a player who went to a mid-table club at Fulham and is having success. He gets a lot of playing time in a top league and trains to a very high standard. He might not be winning titles but he is still playing at a higher level then most of his teammates on our national squad.
Another good example would be Jay DeMerit. He played for his college, and then moved to the UK on his own, without any contract, and got a gig playing in the ninth division of the English league system. He was scouted for a few clubs and ended up at Watford, where he has captained the side.