Should not the question be "How much experience matters?"
There are those out there who refuse to vote for a candidate simply because of their lack of experience. To them I say, look at the past 8 years. George Bush, Dick Cheney, Donald Rumsfled et al. Do they not have ALOT of experience? And despite all that experience, can you not see the incredible quagmire the good ole US of A has fallen into?
I believe a candidate should be chosen because of a balance of qualities they possess, including experience.