So yeah, some people are just sharp by nature - just like some people are cute, strong etc (not saying others can't develop, but it does give the "naturals" an advantage)
How many of the people in that room could say the same? What communities (or anything else) had they built? If they had built something, did they do it on their own as opposed to being someone brought in after the company was already successful? The kid probably ran circles around everyone because he was an expert (on this subject) among managers / developers / designers and anyone else who could probably do anything but run a successful community / e-commerce site.
I think about this sort of thing as a web developer. How many web developers who build client sites have actually built a successful site? How many designers really know how to design something which can sell? If you haven't done it, then you probably have no clue. But if you have been there, then you probably wouldn't be working for someone else either.
I would put far more emphasis on execution. Lots of founders with "vision" can spin great stories to investors but can't execute quickly enough, or are unable to deviate from their original vision when the market or other evidence suggests they should.
I thought the kid was just lucky until I was in a meeting with him. His thought process basically ran circles around everyone else in the room, some twice his age. I realized then, that there are kids, KIDS!, much smarter than I'll ever hope to be in my life.
Sometimes you have to meet these people to believe they exist.