Argentina is missing their starting PG (Pepe Sánchez), SG (Manu), SF (Nocioni), and C (Oberto), not to mention other key players such as Walter Herrmann and Rubén Wolkowyski. Not only that, but Argentina doesn't have such depth to cover for most those absences, so what you get as a result is a severely degraded version instead. Hilariously enough, some of the same people that were complaining before that the 2002 and 2004 US team couldn't be considered legitimate representatives because they didn't feature their best players (with the likes of Duncan, Stoudemire and Boozer amongst them), don't seem to have much problem taking Roman González as our starting center. Newsflash, the difference between our starters and our third stringers is about the same as that between players NBA and those from the NBDL... scratch that... it's MUCH WORSE.
Now could this current US team beat a full Argentina team? Sure, of course they could. But whomever thinks the recent abysmal difference is primarily explained by the US team itself is setting themselves up for a pretty rude awakening. If the US is going to regain its supremacy, which eventually will happen, it'll have to be over the premier version of Spain, Greece, Argentina, and whomever may emerge in the near future (France?). Say what you want, but at the biggest stage, the games will be much, much different. The times where a team of NBA stars would have a field day against other FIBA teams are over. No matter who you field.