arkestra - I think you so right.
Both DH and I were classed as 'gifted' (ugh) as children - and have the psychologist's reports, scholarships etc to go with it.
Neither of us were particularly happy growing up and struggled a lot on the social front - me more than him, maybe it's easier to be a geeky boy than a geeky girl?
Our DD has always seemed very bright, has hit all her milestones early and has an enquiring mind. Intelligence doesn't vanish, so we have been putting all our efforts into non-academically linked activities for her. I picked an unstructured nursery and we don't have letters on the fridge or 'educational' television.
If she is miles ahead of her classmates it will do her no favours either socially or academically. More important is making sure that she is confident and enjoying herself. We take her to museums and things where she can learn general knowledge and see interesting things, but we don't do letters or numbers or reading & writing.
I do sometime do an internal wince when a friend says that her DD who is a couple of month older/younger can do x, y and z and I wonder if I have done DD a diservice by not having anything learning orientated in the house.
She does know her numbers and can count objects as well as read a few words, but that has just happened along the way, I don't encourage or discourage.
If once she starts school she seems to be coasting, or struggling, or to be very academic then I will take a more active role. At the moment we are just researching what options are open to us in terms of future schooling.
FWIW, I think you can pick out some very, very bright kids from very early on. However there are plenty of exceptionally bright kids who definitely sit back and take it easy for the first years of life and you wouldn't spot them for ages.