The most interesting thing to me about each of these little episodes is how Linus, by creating the brilliant Linux kernel, is lauded as a sort-of-oracle when giving his opinion about very non-kernel things. I quite like the simple, opinionated approach to Gnome and Unity but my opinion (and others who may agree with me) matters somehow less because I didn't create this great thing that has nothing to do with UI design philosophy.
I guess that's the true value of geek cred.