It was great to hear that Google decided to sell Performics, an SEM agency. Check out my quote. If ever there was a violation of the "Do not evil" mantra of Google, it would have been maintaining ownership of the firm. Google would have had a hard time telling people that no one has a special advantage in winning on organic and paid search rankings while owning an SEM firm.
On top of that, it would have disrupted relationships with firms that help grow advertiser search engine ad spend. It would have been like an automaker owning a large dealer group - not good.
Smart move Google!