The tone of a discussion is shaped as much by who doesn't comment as who does. A product comes out and a lot of people are excited by it, they comment accordingly. People who aren't, don't, unless there is something outrageous about it. Maybe there is in this case but the point still stands that when the product fails, it's a very different set of people who feel compelled to comment. And this is totally expected because "that's a shame, I liked it" doesn't seem to contribute to the discussion. Neither does "this product doesn't excite me", even more so because that's kind of the default assumption. So an online community or institution or publication can seem very fickle, especially when the commenters are pseudonymous.