I have actually wondered about if smoking cigs helps clean you out faster too. I have been a smoker sadly for too long and have been trying to quit lately but have also been nervous about it cause I have drug tests every 2 weeks and I still smoke right after them sometimes. I have been nervous to quit in fear of my metabolism slowing down and not excreting THC out as much. In my opinion it helps to an extent, but probably your metabolism goes to normal after smoking for a long time and quiting means it just drops to below normal.