There are pros and cons to everything. If you're main goal is to be fast on the drag strip then 2 wd with big drag tires on the rear would be better. If you're interested in handling and curves, then AWD is much better. If you looking for all around street performance it's somewhere in between. My opinion is for practicallity and on the oily streets from red light to red light, the AWD gets the nod. I think on a stock truck, going to 2 wd would calculate a 1 sec. reduction in the 1/4 mile, not in the 11's.
Jim