Right on Goldenear! Excellent point. And, of course, they do want morons to walk through the door...they're an easy mark!
As for best auto dealer commercials, the only one that comes to mind is Smith-Stokes. Haven't seen them for a while, but they give the impression that you'll be respected at that dealership. Their commercials have a "folksy" hometown feel that they say is worth the drive. I remember thinking when I saw them that that's the way a car dealer ad should be.
It will be interesting to see what the auto industry plans to do in 2008. I've read articles about more Internet marketing, saying that's the wave of the future. I think radio is going to have a tough time with the auto industry this year...maybe even worse than 2007. BUT, I predict that business will rebound in 2009.