Yes, of course everyone is entitled to an opinion. I'm not saying they should shut up, I'm saying I'm baffled as to why they pick the core strength of the fastest growing companies and say "this is wrong".
Perhaps it's that they are in the business of trolling, they get more eyeballs if they state very counter-intuitive things, like John Dvorak from PC Magazine.
You know what Twitter is doing wrong? Limiting its users to 140 characters. People need more characters to express their thoughts. Twitter needs to be more like Wordpress, a vehicle to really transmit your deepest thoughts and not meaningless chit-chat. And embedded pictures for those who like sharing their thoughts in a non-text medium. That would capture lots of market share from WP and Tumblr.
That's true about everything else too, not just technology. We just happen to be agitated because that's what we know best. Opinions are a dime a dozen.