The only one of them I've clicked on before is ipads101.com, because they so flagrantly rip my content every single day. None of the others are sites I've clicked on before.
My main point here is that my site doesn't match any of the criteria for getting slapped by Panda. It's a site that has its content ripped off a ton, and every time I report the offending spam sites to Google there is no response at all.
Unfortunately panda is something I can't help with, other than passing the site along as an example of where it may not be giving good results.
Based on what I've been able to debug so far though, I'm pretty certain that those scraper sites aren't hurting your ranking, as annoying as they are. I'll keep digging though.
