Just to save everyone the effort, the closest thing to evidence amid that blog post's many wild allegations is that the pandas update changes around citations hurt the site's google flow. This isn't surprising. That hit a lot of low quality websites that were essentially arbitraging google to aggregate content duplicated elsewhere on the web. I worked for a similar business with considerably more traffic. We didn't interpret it as some directed conspiracy against us. We knew from day 1 that's a risk of developing such a site, and why original content still matters a great deal. We adapted and moved on.

The remaining proof claimed is that a whistleblower told him Matt Cutts implemented a penalty manually. But while our poster is quite willing to share the allegation, they're not willing to share the communication.

There's no proof on offer here.