Can we please stop referring to this update as good or bad just because your site rose or fell in the serps.
Nobody even knows what happened exactly with the algo change at this point. If you do, please let us know and you will get a gold star.
All we do know is there has been a violent shakeup for a lot of queries, and the details algo-wise are far from black and white.
Let's look at the facts and stop generalizing.
For example, eHow, which has been called a content farm by some, has had no significant change in traffic YET, according to reports.