Motorola’s CEO blamed the open Android app store for performance issues on some phones. Of all the Motorola Android devices that are returned, 70 percent come back because applications affect performance, Sanjay Jha, CEO of Motorola Mobility, said during a webcast presentation at the Bank of America Merrill Lynch Global Technology conference on Thursday. Unlike most other mobile app stores, the Android Market is totally open, meaning anyone can upload an application to the store. While Google removes applications that are found to be malicious, there is no mechanism for ensuring that applications perform efficiently. “For power consumption and CPU use, those apps are not tested. We’re beginning to understand the impact that has,” Jha said. You're just now beginning? Where the heck have you been for the past 2 years?