However, if you read the OP, it is the child who has been asking for a grade skip for *2* years... to me, that is a big issue. How do you explain to a child that you do not want to skip simply because they may (or may not!) be a D1 swimmer 6+ years down the road - we don't know what level of passion the OP's child has for swimming over her desire to be grade skipped.

Burnout happens in sports all the time - I see it so often with kids who played a certain sport all the way through high school and just did not want to do it during college. I know of people who were recruited for their sports skills (from D1 to DIII, which does not offer scholarships but where their sports background was a factor in admissions) and then completely drop that sport in college and do a different sport or no sports. I played an indoor sport intensely through high school (travel team, coed team and high school team) and yet when I got to college, I found myself not interested in that sport anymore. Instead I switched to a totally unrelated sport (which I did for many years after college, including placing in top 4 a few times at national team trials).