Almost always auto-assign (or team choice, it's an unprovable and un-arguable fact) will stack teams, just as a matter of randomness (except on Italy). Most recently, folks have been really good about switching it up. I can think of a couple off the top of my head-- Chris, Apex, Mossy, and Coach from the n00bs, and Virus from the rct have switched. I'm sure more than that while I was on.

I know that it's easy to just get lost in the frag fest and go 10 rounds of domination without switching or even noticing, so to those of you who notice this stuff & switch it up, I salute you.