Parts of site failed to load... If you are using an ad blocker addon, you should to disable it (it blocks more than ads and causes parts of the site to not work).
I understand what you're saying burnt toast, there defiantly are people that have tested positive beyond the 30 day period. I believe though that those cases are exceptional.
You can believe what you choose. They are not even close to be exceptional for moderate to heavy smokers. I have personally read the stories of hundreds of users here and at similarly named pot smoking forums in my years of beating drug tests, where I would wager that for those who smoke daily, greater than 50% come up dirty after a month regardless of metabolism and body habitus. I am very physically fit, have very little body fat, but smoke daily. It takes me in excess of 60 days to clean out naturally every time. I have read posts of heavy, sedentary users taking over 120 days to pee clean. Even giving any credence that there might be some approximate number of days (30) for most to come up clean is a 100% fools bet imho. I would, however, say for someone who only smokes here and there that YES, 30 days is more than enough in the vast majority of cases. But if you smoke frequently, I would be not be relying on anything other than home testing with the first void of the morning to assure me I am clean. Since everyone is so different in their body, metabolism, smoking habits, quality of the weed, quantity of the weed, how deep you inhale, how long you hold, etc, etc, etc, home testing is the only way to fly.