About six months ago, critics pummeled Facebook founder and CEO Mark Zuckerberg. He???d made questionable management decisions, or so it appeared from the outside. He???d fumbled the site???s redesign and botched the company???s terms of service agreement ??? moves that whipped up negative publicity and user backlash. Some people asked whether it was time for Zuckerberg to go. Six months later, those critics have gone. The company is enjoying astounding momentum ??? blowing through user growth forecasts and becoming cash-flow positive earlier than expected. Recent management hires make the company look more impressive than ever. Zuckerberg remains firmly in charge.