I saw your post and it reminded me of something I read last week. I was browsing the internet trying to find some info on the age old question of how long marijuana can stay detectable in your system (which is dependent upon many variables, but ranges from 5-40 days in most cases) and I stumbled upon something about tolerance. I'll try to find the link, but the site I saw suggested that your tolerance would drop back to "normal" or that of a non-smoker with 2 weeks of not smoking. Two weeks of abstinence may be a long time for someone who smokes everyday, or nearly everyday, but even a week should have a noticeable effect on your tolerance.