Yegge already knew what Brin thought of his post long before Brin made that comment. You can't seriously think that this wasn't dealt with internally. The only reason that Brin is making jokes about it is because it is 100% water under the bridge for them.
Well, then maybe he should have said something to that effect. The problem with speaking in public is that people will actually hear what you say. If you don't intend to come across as flippant don't be flippant.