Just came across this http://slashdot.org/topic/bi/speed-test-comparing-intel-c-gnu-c-and-llvm-clang-compilers/
Had an issue with your link, I managed to find the story at: http://tech.slashdot.org/story/13/11/04/1913246/speed-test-comparing-intel-c-gnu-c-and-llvm-clang-compilers.
– Matthieu