Good topic:
Almost started a topic about this to but I am too lazy.
I think I have read that the Society teaches that, technically, Jehovah is presently only a kind of grandfather to those with an earthly hope, and that only those of the 144,000 anointed class can strictly regard Him as their Heavenly Father.
Your not dreaming, I absolutely remember the grandfather reference to the earthly hope JW's. (might have been a talk though?)
Love to see a reference.