Hello, my name is Ikey Doherty.
I am the founder of the SolusOS Linux Distribution.
With SolusOS 2 we have decided to create our own base from scratch, using the PiSi package manager.
After many repository revisions, it soon become apparant that GCC (4.7.2 in this instance) is dog-slow.
Out of pure curiosity I attempted to rebuild packages using Clang.
Clang had been pulled in as a dependency earlier on (due to mesalib's use of llvm) and I'd paid little
attention to it. How foolish 
Quite simply it is the fastest compiler I have ever seen. One fact that never
seems to be mentioned is that by using clang as the compiler, ./configure scripts run infinitely faster than
when run with GCC. Obviously this is due to the test binaries being built to test various compiler features.
In a word: Stunned.
So I tried building various other components with Clang. Notable (and well known) failures include GLibc and the kernel. I find it more insulting that the standard components put forth by GNU (such as glibc) rely on their own non-standard extensions. Simply put: If you want to use one, you must use all. The case extends to binutils, gcc, etc.
So, mild rant aside.. I'd like to make it known that I intend to build the vast majority of the SolusOS 2 software repository using the Clang compiler. We'll literally use a helper import inside the build files to switch each packager over to Clang/LLVM. My greatest joy will be when the entire repository is built
using Clang, with no dependency on GNU/GCC extensions. This ties in more with my vision of vanilla software.
Last but not least, thank you for Clang/LLVM. It's one of the most inspired tools I've used in a long time, and for that I'm grateful.
- Ikey Doherty
SolusOS Founder (http://www.solusos.com)