Interesting, I actually think it's more common than just Daniel. Ron and Kenneth strike me as two folks that also see the nanas >very< clearly. Although I didn't have the same resolution/clarity, it does seem to show up generally like that in my experience.
40hz is only A&P!
I'll bet Daniel experiences the less strong versions of these nanas when he does experience them. The strong versions seem to be more related to the earlier paths. At least for me, while I can "locate" experiences in a nana, it's a fraction of the strength than it was in the past.