I'd like to point out something I'm noticing here... maybe we can all confirm it one way or another.
It seems like there are two distinct camps in this thread:
People involved in ecommerce sites
People involved in content provider sites
People involved in content sites are seeing crazy, wild disparity in the SERPS, seeing sites with quality content completely deranked in favor of scrapers and content farms.
On the other hand, my impression is that the people involved in ecommerce sites more often than not believe Google is doing the right thing and aren't seeing the wild SERP results where quality sites are being unjustly penalized.
Does this sound accurate to everyone else? Maybe everyone should say what category their experience fits into.
ME: Content providing sites, seeing PANDA trash everything and no idea why.