If it flowers most of the day then maybe they don't consider it significant. I don't remember when it starts to fade but I don't think it is early in the day. There must be others in the forum who have it and could comment but might not have seen this thread since it's not mentioned in the topic title.. I suspect growers would be more likely to mention its being nocturnal if it flowered mostly at night and wasn't open for long during the day.
