I guess the pundits who said that whites stayed home are partially right. Compared to their usual high turnout, whites didn't do as well, whereas blacks turned out more than ever. I hadn't believed the complaint that whites were demoralized, and therefore they stayed home in record numbers, but it appears to be true to some extent. However, whites still poll above their weight--so not a sign of generalized malaise.
GOP campaign operatives are still moaning that they woulda won had they matched their 2004 numbers. I think they should let go of 2004 because that's a holy grail they probably won't repeat in a presidential election year.
It also looks as if the voter suppression efforts in Florida and Ohio backfired, which are lovely just desserts. Democrats take note! All parties take note!
Caveat: This data is based on exit polling, which isn't the best methodology. However, it's all we have. If you're interested in the topic, it's worth wading through the source article.
"White voters also outperformed their eligible vote share, but not at the levels seen in years past... As recently as 2004, whites typically outperformed their eligible vote share by at least 2 percentage points." -- Fox News
... however voter deception or self-deception is an expected part of the game.
Update 5/9/13. Another good article at HuffPo.