My airline SOP is the captain makes the abort decision so he has the throttles once set by the FO. It eliminates any question about who aborts. I have taken off on 13,000 ft runways when we only needed 5,000 ft so knew the V1 speed was a legality, not a safety speed. I knew after V1 I could stop with just reverse as in a normal landing and have no brake problems. I also knew I would have a lot of explaining to do even though I cleared with minimum braking with 5,000 ft left. Sometimes it is easiest to follow the rules even if they don't make sense.