I'm in a similar predicament, only there are many gestures I use to open up a lot of different things, in which I'm not sure if it's "thinking" or just hit an unrecognized gesture. So I think what he was after (which is what I am after) ... can you default "unrecognized gestures" to do something?
For example, if instead of popping up the unrecognized gesture box, it just spits out an OSD for a second so I know it didn't accept it?