I've been at the top of my Bronze division for almost a week (as you may know), but as I was trying to get promoted, I ran into an interesting speed bump when I was pitted against a Gold player and, um, won. The guy was randomly assigned to Zerg and admitted that he sucked with Zerg (and boy, did he ever), so I won the match and the game automatically assumed that I could hold my own against Gold players. So it started putting me up against people I was most certainly no match for. Eventually it settled on Silver, though, so hooray for that.