Perhaps, but I don't see the need for the gcc did it first responses. A simple gcc and clang both have ful c11 support now would seem more appropriate is basically all I'm trying to convey.
This is totally a competition, although the bar is probably pretty low.
If Clang is feature complete, compiler and library, and GCC takes ~N years more to be feature complete, compiler and library, then Clang could win. People might say, "I'm tired of not being able to use feature X, it's been implemented in Clang for two years", drop GCC, and install Clang.