One of the few times in recent history when Gunga-Dan was actually right...he gets crap for it. :)
I agree. The expression means sleazying the presentation of something, and while it may have had its origin in Victorian references to prostitutes, I think he was referring to the program features, not to Couric.
It's like the "niggardly" argument -- a word that never at any time had any history of racism and is not even spelled the same as the N-word got someone fired. It's PC overkill. Mooves probably has some private issues with Rather. OTOH, Rather should keep his mouth shut and cut his losses.