Canaccord Genuity analyst T. Michael Walkley dropped his estimates for RIM's BlackBerry PlayBook on Wednesday based on investigations of its performance in shops. He dropped his target for 2011 sales from 2.2 million down to 1.5 million based on checks with retailers. They were still facing "soft" sales, and price drops like Best Buy's Labor Day weekend sale were a plan to "move inventory," he said.