Eric,
I was just using that term as an example, but the point was more on where you deliver someone who does search specific terms like that. By taking the comsumer to a "tahoe" specific page we are increasing the chance of converting the customer into a lead (same concept as a microsite), but at the same time giving them the freedom to browse your entire site. I wouldn't expect terms like that to give a dealer an avalanche of traffic, but I sure don't want to ignore the fact that people are typing longer search queries, and if presented with what they ask for with one click, then the odds of them converting go up dramatically. Our CTO just returned from the Goolge Auto Exec conference, and Google now says that the average search term is 4 words. So things are trending towards people typing exactly what they want.
A great non auto example is:
Google - spiderman dvd
The first organic link is Amazon. Do you go to the homepage or directly to the dvd?