That's not correct, only Adam knows exactly when someone gets Veteran status and talking about it has usually resulted in the requirements being changed. That's because when someone posts "you need X amount of posts" we always get at least one person that spams the place up trying to get there. There are other factors too but I'm not going to get into that.
In short, you get it when you get it. Sometimes if you're really good at something you'll get promoted earlier but generally it's just a matter of earning your place here.