One of the common factors in whether or not your side wins, besides when one runs afoul of a premade, is when a team works together as a cohesive unit, even if you don't win, you do far far better than when everyone is soloing.
This is something that the Horde in the Rampage Battlegroup seem to be able to do, regardless of it is a PuG or not.
Be it because they actually DISCUSS things before hand (blasphemy, I know), or be it that they realize that four rogues working together will own just about anything that comes their way (oh God, that WSG game SUCKED.), or that a disc priest, paladin combination is nearly impossible to beat and therefor they can do whatever the hell they want... be it what it may, the Horde have mad leet communication skills and the Alliance do not. Which always seems backwards to me, given the names involved.
Those few times when you do have a leader attempting to actually lead, it's like trying to herd kittens through a field of butterflies. They either ignore you, or ignore you, or bat at your heels while purring. Or viciously attack in badly written English.
Or if/when the attack plan doesn't go as intended, they start to bitch and moan and complain, rather than help modify the plan to fix what was wrong, or deal with the unexpected. Because this helps everything.
Simple things... "Need healers on FC", "FC coming up West", "EFC going down East", "Don't go Tunnel", "Go Ramp", "Inc. BS", "Inc. TP", "I'm tank, going in on Drek"... can be the difference between success and failure... and often are. Yet people do not do this. They rush in, or solo defend, or solo run the flag, or solo try to get the flag back, and then whey they die, or fail, they blame everyone else for sucking.