Unless your driver's window is huge, I'm guessing that any times savings from weight reduction will be lost in time struggling to get the next driver in the car. Same for passenger side. (It's a lot faster to have two guys helping the driver in, particularly if you have different waist sizes and need to tighten the lap belts really tight.
You need a complete metal surface between you and the gas tank.
Personally, I like lots of metal between me and things that burn, like engine bays. I also like as much meat as possible between me and the idiot next to me. And personally I want to be sure I can get the hell out as fast as possible, even if the car is lying on it's left side and burning.
Near-Orbital Space Monkeys
#528 BMW 528e 121hp Black "Saturn 5" Rocket car with orange foam flames. Sold.
#71 Yellow Fox Mustang. For sale.