You dont even have slight hallucinations while falling to sleep, just like in the linked article? My first sign is I usually start hearing voices which I almost always know are not real.
I think I had them when I was kid, but not anymore.
And just to be clear, I didn't mean that I fall asleep as soon I close my eyes. It's just that there is no "transition" between being conscious and sleeping. And then, suddenly, I'm awake.
I have that idea that my mind suppresses the memories of dreaming and falling asleep, because when I was a kid I had two recurring nightmares that I dreamed of almost every night. Still, never did proper research on this topic.
So if you try to stay awake like Dali you will only skip time intervals without seeing anything? That's interesting. If I am too sleepy but still awake I even start hearing sounds and start seeing vivid images in my head with open eyes.