Tweeps freak out when a Google exec leaves to be the CEO of Yahoo!

Marissa Mayer, a longtime top executive at Google, is single-handedly shaking up the tech world by committing what many are considering to be an enigmatic career move: She’s agreed to take on the role of CEO at Yahoo. The company, which has struggled not only to keep up with its competitors but also to find a suitable top dog in recent years, appoints Mayer as its fifth CEO in five years. Mayer, who begins her new job tomorrow, has coolly tweeted that she is “incredibly excited to start [her] new role at Yahoo!,” but the Twittersphere remains largely perplexed by this move. Click through the gallery above to see some of the most notable reactions. [Source]