Been watching this guy's Jade Nectar grows for a couple of years now.
Fun stuff.
I think he just means that the Iranians will flower at any light cycle less than 18 hrs.
Not a true auto, but for most climates will act light an auto.
Some of his Iranians just go straight into flower, like little chunky autos, and others with supplemental lighting I think just go full photo style huge plants.
German guy MadMac at the Original Haze website also likes his Iranians for creating high latitude haze and sativa crosses.