Steve nailed it as far as I'm concerned. The US lifting community simply does not care about Olympic style lifting.
Why we don't care isn't really important. We don't and thats that. We have other strength sports that we do like, and put effort into.
We could produce the finest lifters, if we had any passion for the sport. Frankly, most people simply do not see the need to work the olympic lifts.
They require time, and patience to learn. You need special equipment to fully practice the art form, as well as a knowledgeable coach to guide you.
We have the equipment, but we don't have very many coaches, and the pool of lifters that we have to pick from is not the cream of the crop as compared to the untapped potential of lifters that simply do not pursue the sport.
If we were t put our Countrys collective passion into Olympic lifting we would be dominate as anybody else. It's just not that importantto us, so our results manifest that attitude.