Alyssa, yes, it could be that a lot of people who get to our product pages are looking to buy, but that's not the purpose of the pages. They just happen to rank well for product-name/reviews keywords. They are useful from an unbiased product review standpoint, but perhaps shouldn't be outranking official brand and major retailer sites, as they've done in the past.
These product pages could be dragging down the whole site, as we've seen an across the board hit on all of our content types, even the highly-engaging article content.
It would be great if Google only applied the Panda penalty to the "bad" content, but that doesn't seem to be the case for a lot of sites.