I play on Moon Guard. I honestly don't think I need to say more, but I will.
I've gotten comments in pug groups and LFR groups "wow, never seen a good player from moon guard" and "moon guard? why dont you play on a real server?" "go back to goldshire fag" "people actually reach level cap on moon guard? lol"
These are all actual quotes I've gotten from people in random dungeon finder groups. When it comes down to it, I don't even RP in any fashion; I am on the server because the community is far more interesting, interactive and close-knit than virtually any other on the US servers.
Also, Horde MG has never had anything to do with Goldshire and never will. Most of the people from Goldshire are not the actual players on Moon Guard.