I wouldn't really put a number on it. I would more consider it the general age difference between the players. Take myself for an example, I am 23, most of my local tournaments and even in the tri-state area around me im at LEAST 10 to 15 years younger than the next youngest players so I would consider myself a "young gun". Take SVB for example, you think if he is playing Efren he isn't considered a young gun?