I voted "Decent" but that was after 2-3 listens. Now I'm up to a dozen+ and I would vote "Very strong". I would never vote for "Instant classic" because (a) it's an oxymoron, and (b) classics MUST stand the test of time, which obviously is impossible this early.
I read a lot of the criticism of the album in this thread, and honestly, it's all pretty fair. One commenter mentioned that it's all pretty good but there was a feeling of "heard it before" (either by DT or someone else). Yes, that's probably true. But I don't really care.
I was a Pink Floyd fan before becoming a DT fan, and the first Pink Floyd album I ever heard was The Division Bell - PF's last album. I LOVED it. LOVED LOVED LOVED it. Now, having heard PF's entire catalogue, I see that The Division Bell was not really anything special; it was just a very polished, very well done, very safe culmination of everything that PF had pioneered in the past. But hearing it as my first album was FLIPPING AMAZING.
That's kind of how I feel about modern DT (ADToE and DT12). I, almost unfortunately, know all of DT that came before DT12, so I have the potential to be a very harsh critic. It's a very polished, very well done, and very safe culmination of everything that DT has pioneered in the past. But I'm cool with that. It's maybe almost too polished, too perfect; maybe lacking the rawness that truly genius albums like Images and Words have. But I can logically think that and still love listening to DT12. It's really just a great album. Probably not "classic", but if I were stuck on a desert island with just DT12 I'd be pretty happy (with the choice of music, not being stuck on a desert island).
And if a 15 year old kid picks up this album and has never heard DT before, they might be blown away just like I was by The Division Bell. This is great music and I'm going to love it; how it compares to the past just doesn't matter to me right now.