Nah, I wouldn't know about a fix. I got it on PC. I haven't even heard of the 360 having any problems.
If they're using a matchmaker it could be a fluke. Maybe some guy lives close to you and his internet is overextended because he forgot to turn off his bittorrent. Used to happen in MW2.
Or maybe they fucked it up with the tiny thing they implemented for this weekend, although that would be impressive.
I can understand wanting to balance the killstreaks, but I also kinda liked chaining them together. It wasn't the most competitive thing to hide under a table while your harrier earned your AC-130, but I missed the MW2 killstreaks playing Black Ops.
It was a cool tactical element to have to counter whatever was coming at you from above, and also a nice gamechanger if people weren't careful.