[sincerely]

To the best of my knowledge, research is indicating that early specialization in sports only contributes to a very modest gain in skill later in life at the cost of much higher dropout rates, decreased measured enjoyment, and increased injury rates among participants.

My personal experience as a near-Olympic class athlete (swimming) backs this up - the people that were on club teams at age 9 were not the same people that were later swimming at a level where they could qualify for Olympic Trials.