A 3v3 team on my server (Cyclone battlegroup) was stuck with a rating of 2060-2090 (around 70th) and they transfered to some backwater server and they are now 2nd. The difference between some battlegroups is huge.
Anyway on our 3v3 we might start to monitor when the lock/spriest/paladin combo play simply because there's no way we can beat them unless they suck. We hover between 15th-35th place and everytime it's because we hit a wall against those teams (we are holy priest/ms warrior and warlock). Once fear ward is on cooldown I just get chain feared and there's no way I can stop them from killing someone. Add CoT, death coil, silence and spell lock and I can barely cast anything that isn't instant. If you have any advice against those teams feel free to share
As for the drakes I don't see how the top 50 teams or so in every competitive battlegroup doesn't deserve one. 50 teams out of 10 000. I wouldn't call them "scrub". While the top 5 is usually clearly superior to the rest of the battlegroup there's not much difference between the 10th place and the 30th place. It's all relative to who they played during the week. I also think it's even more true for 2v2 and 3v3 where class balance is a major factor. An awesome spriest/lock team will always win against an awesome pally/warrior team. That's just how it is.