Since last year (happy birthday iPad) I have been performing all my live sets with TouchOSC w/ Osculator and everything is very stable.
Some keywords are sent directly in OSC from TouchOSC to Modul8, some are redirected in MIDI from OSculator and keyboard shortcuts that are not in the keyboard mapping, such as workspace shortcuts are also managed by Osculator.
I always run a local wifi network and I never had any problems with the OSC module.
I even controlled 3 computers running Modul8 with an iPad + Touch OSC+osculator+OSC module+Network module. Pretty neat isn't it? and the signal/response was quick. I currently don't have the time to do a video about that but I'll do it for sure in the near future.