Interesting point coming out of a nearby discussion, (but requires a separate thread.)
Hothousing is a word invariably used as an insult. But is it one? It has been said, I don't know if it's true, that starting tennis at five is too old. Presumably most three or four year olds don't show great tennis genius, so presumably all three year old tennis players are being hothoused!
But, I guess if they're playing tiddlywinks and not tennis then they're not being hothoused (but I can't see the difference.)