There's a difference between what people say and what they do. They can even change their minds as the moment of truth gets closer.
The real fact is, these polls are worthless.
In the last price spike, people were getting rid of their large vehicles and buying smaller cars. Smaller cars, even used ones, were gaining value on the market. (Some of that increase in valuation might have had to do with the market distorting effects of Cash for Clunkers.) That will probably happen again in another price spike.
Now that the price has been lower for a while and people have gotten used to it, people are buying and driving large vehicles again (especially where I live, where it seems like everyone and their grandma has a large super-duty pickup, just to drive to the grocery store two blocks away). (But even here, during the last price spike, people were getting rid of their large vehicles... there was a definite trend.)
Don't pay attention to what people say, pay attention to what they do.
If there is a price spike, people *will* change their behavior, somewhere.
They have no choice. They have finite monetary resources and they must allocate money in certain categories each month. Something will change. Count on it.