SOURCE: http://www.dorkly.com/article/58061/5-crazy-fan-theories-that-make-total-sense

EDIT: This is the pic in question

http://fallout.wikia.com/wiki/Vault_Boy?file=VaultBoyFO3.png

What do you think of this? Or am I just now finding something that was well-known before-hand?

Well I saw it when they published it, and sure, it makes sense.

Yeah I read about that a while ago. It's a pretty neat little nod.