Mmm... It's enough precocity to be noticeable, especially in a kid who doesn't put up well with being bored or prevented from pursuing his interests, but it's actually on the early edge of normal. Not as extreme as some of what you're describing, for eg. He's exactly on track with most of my friend's kids, and if he weren't as demanding as he is, I'm sure I would never have started feeling like I needed a forum like this anywhere near as early. (That and a certain lack of support from DH, which is a long story, and which is improving)
I do suspect that what we're dealing with is "smart baby syndrome," and that most of my friends, being gifties, have produced little gifties. And we've just got a whole mess of little gifties wandering around making it look average

. I doubt we're dealing with the extremes a lot of people here discuss, though! (well, on second though, probably one of the bunch IS...)
I'm "2e," I'm vaguely hoping he doesn't have the troubles I had. My issues started showing at about the age he is now, so I'm likely worrying too much. Well. Ok. So... I've always been a little intense, eh? I'd be worrying too much even if I didn't have an excuse. One of the reasons for being on here is so I work my thoughts through where he won't hear about it, or be too affected by my questions.
I fall a little bit into the "don't tell 'em" camp. I totally understand where that falls apart, but I, DH, the teenager I'm currently tutoring, and probably most of my friends have been badly affected by some mistimed and misdirected messages about this stuff.
Ok, I'm done now...
