Seven vehicles on the top-ten list of best-selling cars for March 2011 sold more than 30,000 units. Only three accomplished that volume in January and February. Needless to say, nearly all automakers are on an upswing. However, the list also shows significant gains in the midsize category, with Honda, coming in as the number-two best-seller with their award-winning Accord.

This is a notable accomplishment for Honda, as the first two places usually go to…