I find that most of the facial hair has shed after the first 10-12 days, but it's the last few of those (days 9-12, say) when I really start seeing it clear. Prior to that, I only get small amounts of loss each day. But don't worry, it all depends on your rate of hair growth and I was told it can take 2 weeks or more.
I find that body hair sheds more slowly -- but that makes sense, since it also grows more slowly, and they only want to laser it every 2 months instead of every month.
I hear you on the pain, btw. When I had my test patch done I was like, "Oh, this is really no big deal!" And then they did my whole face, and... that top lip, omg... ;_; And now they keep putting the power up! >.< Top lip and jawline are pretty horrible for me. On the body, I find it doesn't hurt at all.
Anyway, all the best with your results!