Honestly, GT and nametower are mature business people, but IMHO most teenagers that I knew when I was that age would not be so fair, professional, and honest - especially when they could hide behind a fake name to post on a board like this.
IANAL, but the law says minors can't enter into contracts without the consent of a guardian. This means anyone who does business with a minor here may run the risk of getting screwed and having no legal recourse.
Personally, I'd do business with those two and a few others who have identified themselves as being minors, but would be careful with others. Just look at how many people show up, post like crazy to get F$ or otherwise abuse the forum and get banned (including the guy who started this thread) -- btw, I'm not saying those people are all minors, but that they sure act childishly.
BTW: I started programming when I was 14, got an internship at 16, and was coding on real shipping products by 17... so this subject (youth does not equate to inexperience and is no excuse for lack of respect) is one that I've had a great deal of experience with. You guys are lucky you're online, you have a certain advantage in that you don't have to reveal your age until others have already developed respect for you and your opinions. Back then I was working in a real office where people twice my age were resentful of the fact that I was getting to work on more interesting, profitable, and key projects than others with more seniority.