I wonder if a military jet on full afterburner would burn fuel faster than dumping it?
Well, yea it would be faster in full AB, but the aircraft would also accelerate eventually disappearing into a black hole at warp speed.
There are several utube videos of F-111's doing what was known as "Torching" because the fuel dump mast was located between the burner cans and ignited the fuel... It's quite spectacular particularly at night. That is the faster way of all to get rid of fuel...
http://www.youtube.com/watch?v=JieWuez-_t8