They are not really olympic super powers and that's why I put it in quotes. But they are definitely super powers in a bunch of olympic sports, especially team ones, and that's why their 3 golds look really weak.
Both were main favorites in football and none won the gold. Spain are super powers in handball (both men and women) and only managed one bronze. The Brazilians are the only real super power in volleyball and the men vball team choked really hard yesterday. Spain is a traditional big gun in water polo but they failed to even make the semis, while the female water polo team lost the final. In basketball Spain is a powerful team, but I guess they didn't really stand a chance vs the US. The Brazilian male beach vball team also lost the final, despite being super favorites. Their female team also had to do only with a bronze.
Then you have some individual stars who failed to bring a gold.
Btw, if RUS's USSR still existed, those guys would have won 46 gold medals, same as the USA, but the total amount of medals for them would have been 165, which is 61 medals more than the USA.
Such a shame, RUS