I don't see why it would matter. In fact, as you get to larger samples, you run a larger risk of making errors, because it's hard to keep on top of everything. When you have a small sample for an evaluation study, you can be more involved and make sure that everything is being delivered the way it is supposed to be delivered.
As I mentioned earlier in my presentation, the study in the state of Arizona found a huge number of false alarms. In the CSC evaluation, we found drifts; you'd think the person was in the east end of Toronto, but he'd be in the west end.
The technological experts and engineers you're going to listen to can also talk about this issue, because there's more than one kind of electronic monitoring device. There are many different ones. They all have their advantages and disadvantages, but none, as far as I know, is foolproof and has 99% accuracy.