I think the whole thing about "that's a girl's car" is really goofy. I have seen this topic on several boards over the past few years, and it seems to be a regional thing. For example, in Florida they might think a Toyota MR2 is a girl's car, but in the midwest they say they have never even seen a girl driving an MR2?!?!?!
The only car I classify as a girl's car is the VW Bug with a Daisy on the dashboard.