Originally Posted by TheRed
It's obviously not a stat because everyone's speed on their strokes is different. I'm trying to make the point that the 5" gives an extra bit of oomph on some shots, and that's where the benefits are.
Power is a function of momentum (weght x velocity), racket flex and ball deformation on impact, not really the head size.
Although longer mains and more open string patters associated with bigger racket heads will give you a higher launch angle, so the ball may fly further given same velocity.