I done tole ya...I aint sayin nuthin. Just axxin a question. Rich said it was a question of good coachin, depth, and chemistry, as I recall. He seemed to conclude that the USA wasn't lackin in depth or good coachin, and said it musta come down to chemistry. I then axxed him how mere "chemisty," presumed to be a LOT better for Spain, than the USA, could come that close to beatin vastly superior talent. I don't think he ever responded, but you did.
Unless I understand the purpose/relevance behind that question in this thread, I think this is best discussed in general NBA threads. I am not sure why you would post that here if it did not have any relevance. I am assuming that you are trying to get to something, but unless you explan what it is, it doesnt make much sense to discuss this here.
Like I said there could be a combination of zillion reasons for why they didnt play well enough from chemistry to ego to overconfidence to quality of opponents.