I started mid-Decmber, and I've entered about 200 notes, and got 3 hits so far. Mine don't seem to get hit as quickly as some others, it seems, but, then again, it may be the 'watched pot never boils' idea.

Also, I think that it may have to do a little bit with where you are. The hits seem to be faster in Alberta, and the West coast, and much slower in Ontario (I'm in Toronto). My generalization may be inaccurate (ie probably lots of people will jump on my comment) but I think that has been the topic of previous posts, ie liklihood of hits based on geography.