Thank god someone has sense. If anything no one should take his predictions with a grain of salt, but his insights is far more reputable then most other analyst, and offers a 'preview' of what's to come in price of uncertainty of accuracy.
However, I can't believe people would think anyone would trust this guy 100%, we have said he's trustable, but not 100% accurate. No one but apple knows.
And the most boring thing about all these arm chair analyst critics is that assuming they even know how to spell the term "analyst," most of them wouldn't know the difference between an 'industry' analyst and a 'financial' analyst. It's much more than merely gazing into a crystal ball, reading tech magazines, visiting trade shows or making an appointment at the Genius Bar - these analysts, though far from perfect, varying in quality of prediction (as you say, they don't work for Apple and only Apple knows), do their best to serve their own customers with information about Apple's future plans (which change sometimes even more than analysts' predictions).