I never even heard about this survey. The results seem... wrong. "Crunchbang" is more popular on servers than OpenSUSE, and Red Hat doesn't exist...
Just the name Red Hat, isnt a distrobution. Its the name of a company. Fedora, RHEL and CentOS are.
I wasn't sure if that was implied by your post or just listed as a reference of distribution names. So just in case it was implied... :)
* Non-server users
* Server users
Anyway he is using RHEL (Red Hat enterprise Linux) in the survey results not Red Hat.
I can see why you might have misunderstood him though. "Does not exist" could be read both ways.