In retrospect, I'd say a better thing to do with a smart kid is to convince them that they should work on things they're not as good at. Nobody's good at everything. However, that would have required individual attention of a sort that wasn't available back then.
There's a grass-is-greener effect though. It's easy to imagine that one would have done better if one had been / had not been accelerated. As a philosophy prof told me back in those early university years, "Life does not bear counterfactuals." She also said "I bet you tell that to all the girls" when I dropped her Hegel class.