You should be noticing results any time now; the nail will begin to lose the discoloration, but that is just about all at this point. You really won't notice much growth since the toenails grow at a much slower rate than fingernails. It can take up to a year for the nail to totally replace itself with a healthy, attached nail plate from the cuticle to the free edge. 2 weeks isn't enough time to notice much change other than coloration at the point where the nail is detached.
I took Lamisil for 6 months starting December 2006. I have had great results. However, the big toenail on my right foot still has discolored nail on the end because toenails grow SOOOOOOOO slow. All the other toenails have grown out. That one was the worst but it is mostly pink now. Give it time.