What most people dub a "normal" childhood is oftentimes unsuited/restricting to gifted children. People have a tendency to worry that putting a bright child in a university setting will hinder "normal" social development, but that "normal" developmental path in many cases probably would not have been a very pleasant alternative to that child in the first place. I myself entered uni at 14 (in the US) and looking back on the past four years, I don't regret my decision to do so at all. I feel that my social skills are at least on par with those of my peers, and I feel lucky to have had the opportunity to have a much more satisfying academic, intellectual *and*
social experience over the past four years than I would have otherwise. Of course, my good experience with early college also has much to do with the fact that my parents were fairly open-minded and never overly pushy. My decision to enter early was pretty much my own, and once in college, I was given quite a bit of freedom and encouragement to pursue social activities. Since the drinking age in the US is 21, I also wasn't left alone when fellow students who were of-age went bar-hopping. Also, I had a support network of other early-entrance students when I first entered college (there was a program at my university that allowed around ten 14-16 year olds to enter college early per year) to help me adjust...so I was lucky in that respect as well...
Although no one can really hypothesize with great certainty about the road not taken, I feel that I would have been much unhappier due to both intellectual and social stiflement had I gone the traditional secondary schooling route. The late middle and early high school years (in the US) are notorious for producing the majority of one's life quota of angst and low self-esteem, and some part of me is extremely glad to have missed that experience...
but who knows?