Doesn't that poll contradict your "very few Debian" statement?
In part yes, but I'm a developer so I'm probably seeing those new Ubuntus that made Ubuntu overtake Debian. If I were an op I'll probably have a more balanced view.
Furthermore the sample is relatively small and my own sample is at least 100x smaller.
CentOS is in a tricky position with regard to ALPN/http2 support--there's absolutely nothing on the horizon. A continuing shift to Ubuntu in the webserver space is almost certain in the mid-term.
Re:Canonical releases Ubuntu 16.10
by qwertyuiop924 on Thursday October 13, 2016 @08:07PM
(#12705257)
How many companies are moving to ALPN/http2? AFAIK, they're still pretty fringe.
See also the results of this survey https://brashear.me/blog/2015/08/24/results-of-the-2015-slas...
It begins to be old but this section is telling "Which Linux distribution do you primarily use on your server computers?"
Not a large poll but I didn't find anything better in a quick search on Google.