The stock market is a fickle beast. Although it's been shown time and again to be a questionable measure of a company's worth, there's still this idea out there that a company is only as good as its stock price performance. Look at Facebook. In the past six months or so, it's gone from a new tech giant with a twelve-figure valuation to one of the worst IPOs in memory.
As John Chambers, CEO of Cisco Systems has pointed out, the corporate life cycle has accelerated dramatically, and Facebook is living proof of that fact.
Unfortunately, despite the influx of media and updated tools of I.T ,capacity for analytical evaluation has not increased much in people so most of them get carried away by glibb talks and apparent shining, over polished images by tricky agents of vested interest. The end result is what you’ve pointed out.