If it makes a difference C+ this month look at three mid end groupsets from Shimano, SRAM, & Campag. They finally settled for Shimano for some vague reasons, but one of their tests were the actual time the drievtrain took to change. Campag was the quickest, OK we're talking fractions of a second here, but that is probably where the clunkiness somes from.
Cable run is cleaner, I believe Shimano have now gone to a hidden cable set up on Dura-ace, so it'll likely appear in the lower groupsets in coming years.
I'm not anti-shimano, got pretty much a full XT groupset on my MTB, but then I don't mind the inevitable components wearing out on an MTB, but I'd begrudge the same on my road bike.