They pretty much destroyed all my sites too MrSavage, including my main website, which has lost 75% of its traffic. Since the 28th September, they've flushed me down the toilet. Eight years of hard work.
Today was actually surprisingly okay, despite the huge drop in traffic, couple with very few clicks. The clicks I got were the highest EPC I've ever had (smart pricing kicking in?). Problem is I wouldn't expect that to last.
How are your sites in terms of optimisation?