I like to think that if I experienced a lack of acceleration and rough running on the takeoff roll (particularly in a SEP) I would reject the takeoff rather than trying to troubleshoot the problem on the roll and continue into the air. It's a lot less stressful sorting out a problem on the ground than it is in flight. I know, I know, benefit of hindsight etc etc, but it's a valid point and possibly a lesson to take away from the experience.