C++ has always had the feeling of a language that isn't quite finished, so there's a lot of interest in where it's going next. C has the feeling of a language that does exactly what it sets out to do, so it's not really going anywhere.
There has not been much about C11.
C++ folks do seem to care a lot about which features of boost are going to be folded into the language spec and runtimes and what else has been dreamt up for their baby, and how they're going to be able to be more efficient, safer and gosh-darnit just all-round smarter in future.
C programmers mumble something about being busy and already having the tools they need to do everything, though (grudgingly) that VA_ARGS preprocessor extension from '99 was quite handy I suppose...
(I'm a C programmer by trade and history, working on C++ at the moment, just in case I pissed anyone off enough to start a holy war :)