No "coffeegrounds" after second IPL Photofacial, is it still working?

I just had my second photofacial yesterday and feel a little disappointed because I see only 1, maybe 2 small coffeeground dark spots on my face (neither of which are in the hyper pigmented spots that I am most concerned about). Since I thought those darker spots meant it was working, and I did have some after the first treatment, does the lack of them this time mean that my spots won't get any lighter?!