Hi Kevin,
I've just checked. OMG it's not configurable on our end. I think we made it configurable. Anyway it's our fault.
When I take a look at the codes, I see that timeout error is high enough(20 secs). I mean if you are having publishTimeoutError, it's likely that problem is somewhere else. Are you sure you set all the things correctly in iOS app? I suspect that problem may be there.
Regards,
A. Oguz