Sounds like the structural advantages Democrats had going into 2002 state elections. And, indeed, Democrats picked up some states like Michigan and Pennsylvania. Overall, it didn't make the election a good one for Dems.
They picked up eleven states, and lost eight.
Yes... my memory is that the Democrats got the pick-ups we were expected to get, but by narrower margins than expected (MI and PA, but also WI, AZ) while many close races went Republican, potential races never became competitive (NY, TX, OH, AK), and the South was a disaster. I was shocked that Romney won. The 2002 state elections were a case where Democrats "did well," but totally failed to beat the spread. Winning in Oklahoma and Kansas wasn't much consolation to Democrats outside those states.