I guess that the most xf-people still dont care for mobile users. I should know this also month before, but i have not cared.Not not seen any one else with the issue, but that don't mean no one else don't have it.
In my opion i will never use a mobile to read/write in an forum, if there is no special reason to do it. And the most time in my live i have at least a tablet near me. But the half of the world (connected to my forum) uses the mobile all the time as it seems.
This was the reason why i have started to "clean" xf from some infos. Finally a mobile style need to be really clean and without a lot of things that are typical for a forum. I guess that programers are still far a away from the real world of normal people.
To make a small test, just watch any normal xf-page and count how many "points/areas" with infos you can see, that you normally dont need.
Maybe this comes from historical reasons, when forums were something for "technical" people.