At USC to receive a Walter Cronkite award, Katie Couric was downright grumpy about Twitter. Except for her Twitter, which kind of rules, supposedly.

The CBS Evening News anchor was on some sort of panel discussion with George Stephanopoulos at the university. The conversation took an inevitable and lengthy detour onto the topic of microblogging, says Variety. Couric:

I Twitter and blog very selectively... I don't think anybody gives a rats ass whether I am about to eat a tuna sandwich. I don't even care.

Some of it is so inane and narcissistic and bizarre I don't quite get it. I don't know why anyone would want to read it, much less why I would want to write it.

So Twittering a tuna sandwich is terrible and pointless, but Twittering "lobster bisque, striped bass [and] fruit confetti w/pound cake" is OK, judging from one of Couric's recent tweets (see left). As is blogging from the American Idol audience.

When will Katie Couric apologize for being a terrible East Coast Media Elite?

Seriously though, KC: We all like to pretend we're the fascinating center of the universe sometimes, and until the rest of us work out way up to the point where, say, David Letterman and TMZ care about us like they do a certain TV news anchor, Twitter remains a choice venue for those little narcissistic moments.

Maybe you'll understand some day, when Twitter subsumes all human thought and expression.