The Tea Party thing was overblown, they took credit for 2010, when in fact it was the normal mid-term result for the President’s Party, I assure you we will see the exact same thing in 2014, Tea Party or no Tea Party.
No, it was far from normal, it was a once, maybe twice a century turnover. The organized party which would most benefit, simply didn't embrace the movement. Which dissolved, by name, not necessarily emotion. I doubt you'll see a big a swing in 2014, though I don't want to underestimate Obama's ability to act contrary to the interests of most Americans.