But he responded to a specific example. If you want to come up with more examples, fine. But don't tell him he's wrong or do a "yes, but".
Being right or wrong about dismissing a bad example doesn't matter. The important thing is to fix the example and then evaluate it.
I guess I have a problem with jumping on someone who was correct.
Perhaps a way to get around the ambiguity (at least in case of github) would be to encourage people to use/link to gh-pages (so we see github.io as distinct from github.com) when they are available?