You would be surprised just how good 12U teams can be, especially the pure 2nd year teams. The extra pitching distance makes a "dominant" 10U flamethrower into batting practice if she has not developed at least one other pitch. The good 12U A teams in our area compete very well against the majority of 14U "B" teams. Just playing up in age is not the only metric for deciding whether your DD is being challenged. I had several 14U eligible girls who opted to play on a 16U team this year than on my 14U team. We beat that 16U team like a drum because we were a better team and played better competition. Being on an older team does not make your DD "better" if the older team is playing in cream puff tournaments.