Elkvis, what i meant was that there is just one single case where C++ having all these advanced features do not help development time: When you're writing a C++ compiler. It was a poor attempt at humor, that is all.
I would however like to see if there is a noticeable difference in compile time between some advanced piece of software written in C, and the same piece of software implemented using C++ with all the new C++0x extensions. But i guess they wouldn't be the same piece of software at all under those conditions, so the comparison wouldn't be very accurate anyways.