im sure the majority of the smokers dont smoke during the regular season/playoffs. they probably get their poofing done during the summer. now some players such as cliffy and birdman smoke during the season, but its got to be a small percentage.
2 years ago, my parents were out of town for a month and half. my buddies would come over almost everyday, we'd toke up, and play ball for hours. not surprisingly, i played a lot better.
smoking weed does not slow them down! if it does one thing, it clears their mind. It allows them to get into the flow of the game. Weed enhances one's ability to enter the Zone. sure there are other ways, but it's easy to do after hitting that plant. sure the come down effects can get you but that depends on how much and how potent you smoke. plus, you can always put another suplement in your body to nullify the come down effect. with these ballers, they're already on a ton of supplements to begin with.