+1 for CheckAirman. I've never had a rejected takeoff, but if I did, say because I was unhappy with the engine performance, there's no reason I'd report it. Not unless it met the criteria of NTSB 830, basically death, serious injury or damage exceeding $25000. Even a blown tire or other real failure comes nowhere close, in itself.
Maybe there is more to this story, I have no idea.