"I would have guessed the leading operating system on the top cloud platform would have been Red Hat and its close relatives, CentOS, Oracle Enterprise Linux, a

"I would have guessed the leading operating system on the top cloud platform would have been Red Hat and its close relatives, CentOS, Oracle Enterprise Linux, and Fedora." So all the surprise he is expressing has nothing to do with Linux ruling the clouds, just which distro of Linux, so why did he pick that title?