Eh, I don't think you can say Houston's influence didn't cross into the mainstream. Mike Jones and Paul Wall definitely broke through and hit the top of the charts for a while. Drake just had a sample of Pimp C on his latest Views. The incorporation of the Lean'd out style is really present in contemporary big hits, and I think - maybe I'm off on it - that a lot of that can be traced back to the Houston scene, or the influence of it in some ways. Just thinking H-Town does get its props pretty often.