Also, notice that Shepard is surrounded by "oily shadows" in these dreams, which could be the Reapers themselves whispering to him/her. This mirrors what the Rachni Queen described the indoctrination of her people as, "songs the color of oily shadows." From what we learned from the derelict Reaper, early indoctrination seems to be characterized by strange recurring dreams.
Oh, snap.
I've noticed that too, but actually that fades as soon as you take the platform up, so I'm not sure. I'm also confused, if it's a hallucination, what all the cinematic cutscenes are supposed to represent, because they are not washed out greyish the way his memories to Anderson and Joker are.
EDIT: Ad dreams, the Prothean VI on Thessum doesn't see Shepard as 'Indoctrinated Presence' (unlike KL), so that's either a small plothole or a wrong lead here.
Guys, all of this makes a huge amount of sense.
Carry on.