indyank - 3:36 am on Nov 20, 2012 (gmt 0)

To answer your original question,

Is Panda Loss Because of Scraped Content?

yes, that was one of the widespread thought processes back when Panda first landed. But with my exp., I can tell you that scraped content outranking the original content owner is indication of loss of authority of that site.

Google seem to be tagging authority to content ownership and not to published dates and domain names. When Panda was introduced, sites that lost traffic also lost authority to varying degrees and this had the indirect effect of scraped content outranking the pandalized sites, who really were the original content owners.