Replying to Young Gun Age

So I hear stuff about how people think someone isn't young in skiing because they're like 16 or 17... you know along those lines. Well I've always figured that people in skiing are still young until like 19 or 20. This is in part due to comparing to other sports such as NASCAR, soccer, basketball, etc. If you think about it, with all the young kids comming up and killing it, the barrier of what is considered a "young gun" is now decreasing to smaller ages. So what's your opinion? What do you think is the age limit before you are no longer considered a young gun?