Don't you guys find this all a bit strange.
Google is saying, we're clamping down on low quality content.
But scrapers are replacing original content in the serps. (I'm actually seeing more junk in the serps for some queries, maybe it's just me.)
eHow is still untouched.
The best part was the official sounding announcement on their blog, claiming biblical improvements in search quality.
And about the "junk floating to the top before they can skim it" argument, I see nothing from google saying the algo needs time to learn whatever it needs to learn.
The message I got was, "We rolled out a super duper algo and the search quality is now better than before."