I consider him worth reading. I've not been reading him for long enough to determine is real failure rate, but when he does get it right, it's often before any others. Then again, one could say it's because he throws anything in the air and ought to hit something every now and then, but still he presents colorful possibilities, you just have to keep in mind that it might not be 100% accurate (or not accurate at all in case of Lucid issue).
So far, for Fermi, I think he's been right most of the time (the mockup and release date issues), be it by luck or good contacts and will it always be that way, I cannot say, but I do give more credence to his articles about Fermi than those posted by Fuad, who seems to be incredibly biased and pretty much wrong 80% of the time about it. As for the article about missing clock target, bleh, I don't know, nor really care, I'll judge it when it gets released and buy the best performance/price (with a minimal performance threshold) when that happen.
For Larrabee, I don't know yet and will most likely only know when it does get released.
For TSMC, I don't find his articles very relevant, I highly prefer Idontcare posts on this forum explaining the management rationales and production processes.
So, in all, I read him because it's kind of funny (so are the forum posts on those topics) as well as getting aware of the possibilities. Once I'm aware of it, I leave it to my own judgment to determine its probability.