Yes OpenVPN is blocked, not only do they block its default port, they block the entire IP so its more intelligent.
For work we use Citrix and that have never been a problem for me. Everything else have also worked but I mostly surf news sites, Facebook, LinkedIn etc.
Speeds have also been good for most of the times.

I don't use the airport WiFi at all, just the wifi at the QR lounges as AM and AS.