None. There all good players but no better than your standard "pubstars." They roll in full parties off equal ability and hand pick games against really bad players to put on Youtube.
Its funny how those guys never run into countless amounts of bettys/claymores/concussions/shock charges that I run into every game.
Do you know how many times I've run into a LONE optic player (confirmed by profile) and stomped him? Do you know how many times I've ran into onlyUSEmeBLADE and outknifed him? Once...for him, but still. Even zxzNoregretzXzz. I've run into him NUMEROUS times. Even had him on my friends list for a period of time. He's terribad unless partied up. Which is the same for most of the Youtubers out there. They are absolute trash unless partied up and pubstomping 90% of the time. The non-youtubers who do well with randoms are the ones to admire.