What the US is getting in terms of overall productivity on field didnt happen overnight, it started with a systematic plan of development domestically since d early 90s.
While i don't expect them to contend for this cup, they will soon be on the level of the top tier within the next 8 years.
I surely don't like them as a team, but i surely have to respect the diligent approach to their development and i have to applaud them with the on field results.