Take it easy Dan, that was just a tongue-in-cheek post, regarding the amount of cheating that goes on in the stock classes at my local level
To their credit, most people don't care until you start winning every time.
On a serious note, I do agree with sled man on the fuel tank issue. I experience this at the high-speed road racing courses, so I try not to run with anything less than half-a-tank. Gas mileage on a high speed track is bewteen 5-6 miles/gallon, so a half-tank is only good for ~10 laps out at Putnam Park (1.77 miles/lap), until fuel cut-out starts.
As for autocrossing goes, I would say it's driver skill first, then tires, then preparation. Personally, I suck-*** autocrossing, but do very well on a high-speed circuit.