falsepositive - 3:31 pm on Mar 22, 2011 (gmt 0)
Low quality to me means: very low traffic, bad bounce rate, no PR, no links, thin content (very small amount of content). I've used this measure successfully to start pruning my stuff.
I've already done quite a bit of an overhaul on my site, but made mistakes along the way that saw a further Google slap that cost me an additional 15% of traffic. I've got a lot of bad pages still floating in cache, but hoping it clears out soon.
Now with regards to what's in the SERPs right now? They're pretty bad IMO. For a lot of my own searches, I skip a lot on the first page now and go on 2nd to 3rd pages. It breaks my heart to see really good stuff get buried below the likes of eHow. I've blocked eHow pretty much. It's terrible. It's truly a plagiarist's paradise. I can imagine the writers from AssociatedContent, Hubpages, Ezinearticles now moving to eHow. Talk about rewarding a true content farm!