Katie Couric, VP Biden, and there's the white guy comment

I was glad to get up this AM and be able to find online, Katie Couric's lame comment, "and there's the white guy". When I heard it last night, I found it very disturbing, but I couldn't quite figure out why. After thinking about it this morning, I think it was not what was said, but more about the tone and laughs that came after. I felt the laughs and tone were not poking fun at our white Vice-President Biden. I felt they were poking fun at an African-American president and a female speaker of the house. In case you didn't see it, Katie said, "Nice to see a little diversity for a change, we have an African-American president, a female speaker of the house and there's the white guy, Bob, hahahaha", with the camera on Joe Biden. It was almost said as if there should have been white guys in those other positions?
You can find a clip at http://www.huffingtonpost.com/2009/02/24/katie-couric-on-biden-the_n_169695.html if you happened to miss it.
And here, just yesterday, I naively said I didn't believe things were always about race. Today it's looking like it's not only about race but about gender, too. Am I the only one who thinks this comment was not about "the white guy", Vice-President Biden?
I wonder how would this have gone over if Imus had said it? I would love to hear your thoughts....