One thing I think the study pointed out that interested me is those with higher IQs are affected less than those with lower IQs to begin with.

Pot certainly isn't for me. I used it as a teenager, but have stayed away from it throughout my adult life. When I get old and grey, I won't rule out giving it another shot when I'm no longer worried about long term effects, security clearances, etc.

Pretty much anything is bad for you without moderation. People have died from drinking too much water. But someone who chooses to smoke pot is making a decision between preserving their cognitive abilities and getting high.