I guess so.. I've only attempted WILD a couple of times, I just got a successful one yesterday!
But yea, most times I try to WILD, it seems like I'm awake for a loooooooong time. But when I look at the time, I actually slept a long time already. Something like that. Maybe it's just your brain messing with you, since your mind is pretty much awake, and your body is still sleepy (and falls asleep even when your mind hasn't yet)