Agency,360i said it has seen brand cost per clicks rise from 50% to 100% across different verticals in recent weeks, adding the price increase "does not seem to be related to more competition or lower-quality scores." "Response has been a combination of confusion and anger," said a digital agency staffer who spoke on the condition of anonymity. "Brand terms are an important source of revenue, but increasing pricing like this is going to damage Google's perception as being fair." Google responded to the speculation by issuing a statement to Ad Age Thursday, saying that the recent fluctuations in CPCs "are often a reflection of how advertisers might be bidding on different terms." Get the full story at Advertising Age