Thanks for the number. I hoped, twice as much could connect, with a performance hit. In my planned application the speed can be very low, as long as the connection is stable. I see, it is not going to work that way.
I must put a wireless mesh in the lab. (Kidding, wireless is not my department.) But this discussion reminded me the off-line capabilities of Moodle Mobile. I will try that - once I get the chance.