Doug's suggestion makes perfect sense when the SuperCharger is not out of your way. If you have to waste 5 minutes each way (getting to SC and back to your route) then the 10 minutes total might be best used charging up for some extra time and skipping a charger. But if you're literally 2 minutes out of the way I agree with his thesis. You can drive faster and charge super fast when you hit the charge nearly empty.
I've had to drive ten minutes out of my way to get to a low-power Level II charger because my preferred one was ICEd. It took almost an hour to recover the distance used getting to the charger...
I'll go out of my way for a Supercharger, unless I can get to my destination directly and there's some place to charge at my destination.