This article doesn't seem to say that 4e is not doing well, but rather that it's not in "the cycle" that would make it sell as well as 3e. That seems to make sense to me. I mean, everything else seems to be cyclical (the economy, family addictions, etc.) so why not our favorite hobby?
The fact that we're not in the "super-profitable cycle" doesn't mean 4e isn't doing well. If anything, Goodman's article seems to indicate that 4e is doing very well, just that it's not the out of the ballpark smash hit that 3e was. And that's OK, because the game is still selling more than enough, the retailers can't get enough, and we have our games. What more can matter?
I'd say we're doing well as an industry, and the fact that someone from inside said industry can say we're doing well in this recession says alot about the quality that Wizards is giving to us.