joined:June 10, 2011
It can be that on Panda 4.0 Google took a new direction (again :-)).
They decided to prefer/outrank "source of information" websites over authority (brand names) site.
Taking two leading conclusions from this in-depth article about Panda 4.00
1. "Google might be looking at in-depth concepts and not just generic and simplistic content nowadays."
2. "Other sites that seem to have benefited from the Google Panda 4.0 update are the ones that focused on unique, high quality and well-organized content. "