Alliance largely outnumbers Horde on my server.
As such, we can't attack and win Tol Barad. And on the infrequent chance we have, we don't hold it.
Numbers shouldn't matter as TB is supposed to be an even match up - if it was otherwise then my server would be having the same problem (we were one of those servers where playing Horde in WG was like being the humans in the Battle at Whiskey post in Starship Troopers) but we aren't, in fact, we've been dominating TB rather nicely.
So if you guys are that badly outnumbered then if anything, TB should be a cake run for you as you've gone from fighting 10-1 odds to even odds.
That's simply not the case. Tol Barad's design removes strategy from the equation - it is simply a case of throwing meat into the grinder.
Now, whether this gear disparity actually exists is another question.
Higher GS means more health/armor, less damage taken, higher DPS/HPS and larger mana pools - while skill can negate those advantages in individual combat there's very little chance for that in TB meaning that the side with 1.2 million health and 3k average dps has an edge over the side with 800k total health and 2.3k average dps, especially in even odds.