Eh? Hmm... Looking at the Senatorial pickups, anyway -
We got Tester in MT - Flaming social libertarian (wants Patriot Act repealed), populist, progressive. Purely grassroots candidate.
Brown in OH - another big time populist progressive candidate.
Webb - Populist, social moderate. another grassroots candidate.
Whitehouse - flamin' lib, but hey, it's RI.
McCaskill - Pro-choice, pro-stem cell research, another populist.
Casey - the only one in the bunch that's much of a conservative (he's pro-life) - Still a populist - Santorum was so unpopular in PA that Bernie Sanders could probably have run there and beat him. PA could have been more aggressive in their Dem candidate choice.
Who out of the "Big Seven" possible Dem pickup races lost? Harold Ford, who tried to out-conservative his opponent Bob Corker.
SD shot down a referendum on banning abortion.
There are a couple issues Dems need to stop kicking around - Gun Control is a loser and Dems are starting to get it (Tester is a fine example), gay marriage is something the country isn't entirely ready for, but seems to be willing to leave up to individual states rather than a national ban.
Back to the point, I don't think this election proved that "America is Conservative" by a long shot. I thik it proved that America in aggregate is pretty middle of the road, the GOP veered hard right the last few years and tried to drag the country along with it, but lost the center. Believe whatever you want about the lunacy of the Dem Party base, but the GOP went all out to sell that point this time, and failed.
('Cos it ain't true.)