At first I'd assume that set mining in STT's and MTT's would be very much the same. Not overall very profitable unless stacks are deep compared with the blinds (30BB+ I'd say) because you would have to put in too much of a stack you cannot reload if you miss, to hit your set.
Also, there are less chips in play overall (1500chips x 9players) to eventually win in order to make the risk woorthwhile.
But thinking about it now, I (and correct me if I'm wrong in this) believe that due to the fact that there are significantly more chips in play, and more players to wade through, that it might just be profitable to set mine longer (blind wise) into the tournament.
I do not have HEM or any tracking software, but I do take fairly accurate paper ( ) notes during an MTT and according to them, I set mine (these are from the last 7 MTT's I've played, including one Rush and one turbo) roughly 1 out 3 small to mid pp's in position, with what appears to be a slight gain. I do this until roughly the 150/300 level, where I just stop altogether. Now my subjective feelings on the topic tells
me that it still isn't really worth it, but since I seem to be doing it anyways...
So this has been my experience, but I would be really interested to hear from our "expert" members about this.
Good post NWF, got me really thinking about this subject.