Why the indignation? There are competitors ripping into WotC from time to time, claiming they don't know what they are doing, that D&D sucks, and what have you. But I don't see any outbursts of indignation then, no sentiments that "competitors should not criticise each other". WotC is fair game, it seems.
And his post was a post on their own messageboard. On D&D's own messageboard, folks. What do you expect him to say, on the official D&D messageboards? Are you expecting him to say: "Our stuff is quite ok, but there are others that make better stuff, go check them out, here are the links to their web sites. And btw, of our last books, [insert title of pet disaster from WotC here] totally sucked, big time"?
What are other publishers saying about their own books, on their own discussion boards?
Are you expecting him to say: "The 3rd party publishers are ALL doing fine, especially your favourite one"? There are several who claim otherwise, Chris Pramas and Eyebeems, to just cite two of them. Many of them are struggling. Like Charles Ryan said. Like others have said. [Insert favourite 3rd party publisher here] might not, but many do.
And fans have complained endlessly about the dearth of adventures, but when Charles Ryan says the same thing, people are outraged.
I think it's going to be interesting to see if WotC focus on short adventures, or huge adventures, or free print adventures bundled with the hardbacks, or strategic alliances with 3rd party publishers, or licenses maybe.
Who knows, maybe Goodman Games could supply WotC with adventures, thereby reaching a much larger audience?
/M