Which is exactly what I use. Doesn't make it any more balanced. If you're going up against a Gauss Hog, and you have your Plasma Pistol and two stickies ready, realistically he's going to kill you around the same time you EMP them. You might be able to get a sticky off, but unless their Warthog is already damaged, it's unlikely to kill them in the first blow.
Now before you shout "Use teamwork!", let's be real - most, if any, go into Big Team or Dominion with a full team of 6 or 8. Even if you're using teamwork, a decently skilled player in the Gauss cannon will at least be able to trade kills. Either way, the probability of going against a Gauss Hog with a Plasma Pistol and Stickies versus being the Gauss gunner and living is infinitely smaller.
The same can be applied to the Scorpion as well. The Banshee not so much, for I feel it is far easily to destroy. But again, you can't sit there and say "just start with PP and stickies bro", because realistically that isn't the completely balanced solution. And this isn't even factoring in players with the Operator perk.