How on earth could he let this go without mentioning it in any way? He couldn't have possibly instructed all his co-hosts not to talk about this situation.
Him being a radio man through the bones (as he recently again explained on his interview with Jeffrey Zeldman) I think he handled this the best way he can. Plus, he knows Gruber has an ever bigger following, so he obviously has every reason to tell the truth, or at least tell something Gruber can live with.
All in all a good short explanation, now we can "move on" and enjoy the other 5by5 shows (tried the new Talk Show, didn't like it at all, but maybe it'll improve).
I really do like 5by5 in general and at least four of their shows are in my standard rotation -- like everyone else commenting seems to be saying, "Hypercritical" is great, with "Back to Work" a close second. "The Ihnatko Almanac" is a fine not-tech show. I like "Build & Analyze" too, although I'm worried it may exceed my quota for parenting-related subjects. (As a childless middle-aged man, it's just so not in my bailiwick.)
He definitely comes across as that, but I'm not sure he is. My gut tells me there was more meaning behind this that none of us are owed, creating public content from it maybe not be the right move; it shows bigger class not to talk about it.