Thats a good question and about a couple of weeks ago was aired on CNBC. I believe people will start considering a hybrid car when gas hit $3.50.
I think gas prices will linearly rise until 1-2 months before the election which is when it will drop like a rock.
This to shall pass. Gas is still $2.03 here as of this morning when I was filling up my Explorer. What the hell it's still a write off anyway when you own your own business.