i think anyone who denies tolerance to weed is in denial. i have a ridiculous tolerance to it. i used to take a couple hits of mids and be retarded and now i get medicore highs that only get so good no matter how much i smoke, and the highs usually last anywhere from 5-40 min depending on the circumstances and i need to smoke more and more as the day goes on to get high. i can notice my tolerance go down a little bit sometimes and get decent highs in the morning and stuff.
now what else i have noticed thats interesting is that i seem to have no tolerance to cannabis + other drug combos. it almost seems like weed and other chemicals form a differnt chemical in your brain that you have no tolerance to. when i smoked on lsd,2ce,x,opiates,benzos,alcohol,x,etc. they seemed to enhance the effects of each other. weed has some unpredictable effects on me sometimes with psychedllics.