Great, But i should say personally instant vapor or sucking invisable vapor can be a huge factors in if they stay or go. Smokers are used to thick instant hits and to get most of them off that they probably should start near combustion and work down if they want.
I personally vape at 210-230c and require a very dark brown AVB, This takes a fine grind and a proper vape. So you can have sympathy for those who do fail.