Last night's "pixie sketch" was apparently the one that pushed Dave Chappelle over the edge as he felt he had crossed the line from parodying stereotypes to merely reinforcing them. 

Whether the Q&A after the sketch was Comedy Central's way of telling Dave that he over-reacted or just an honest conversation discussing the merits of the sketch, I'm glad they did it.

Personally, I felt that the sketch wasn't offensive or enforced stereotypes (it's hard to do that under the banner of comedy; I would say a film like Friday Night Lights enforces stereotypes).  My main problem with the sketch is that it wasn't that funny.  One audience member said it reminded her of the Racial Draft.  I can see the comparison (along with the John Mayer-music sketch) but this was nowhere near as funny and if anything, felt like a poor imitation of previous work.

But on the whole, I've found most of these new sketches to be quite good and certainly not some huge decline in quality from the second season.