What's that then? [Guess who's left out of the totem club? :C]

I believe it's reality because I have no reason to think otherwise at present. If this were a dream, it wouldn't be so structured and someone would be controlling it. It's too massive in scale to maintain for the length of time they have and it would take an experienced dreamer, an extremely powerful sedative, and a great deal of manipulation to include all of us. Unless you're suggesting one of us is the dreamer, but then why does it lack subconscious hints of ourselves?