This isn't solely related to gaming but it's probably easier to discuss gaming just because gaming is probably less prestigious compared to other stuff. No one might really care for the opinion of the 17th best NBA player in the world but at least that guy makes a ton of money and is likely a winner in life so it's pretty hard to argue against such credentials in general. From what I've seen on the Internet when you've an argument you'd almost invariably get into people saying they were once the #28 ranked player in the world for WoW or LoL or whatever. The thing is, does anyone really respect these credentials? I know there's a guy named Daigo in Street Fighter and maybe he's the #1 player in Japan so I sort of follow what he's doing, but I sure don't care what the #4 or even the #2 player in Japan is doing. Now I don't mean not being #1 means you're wrong, but if you want an argument like 'because I was this good at this game' I'd only buy that if you were the #1. Otherwise you will have to put an argument that sounds convincing, and no I'm not particularly concerned that guy can likely easily beat me in whatever game we're talking about because if I cared about that I'd just ask what the #1 guy has to think about the game instead, because he obviously can also beat the #4 guy reliably too or he wouldn't be the #1. I'm not saying that the placement necessarily indicates knowledge, but if I'm supposed to buy the fact that you're right just because you're number something other than 1, I'd go with what the #1 guy thinks instead.