If one can make a bigger arch, then that will cut down the vertical distance that the bar must be moved in a bp, therefore allowing one to lift greater poundages without necessarily increasing their actual strength. Less distance that the bar must be pressed equals greater the weight that can be pressed.
I totally agree here. I will arch like a mofo and stick my belly out as far as I can to cut the distance. The shortest distance between point A to point B is what I shoot for.