Rhode Island here. Unfortunately the Providence store doesn't even have a 15" on display. If Boston had a Space Gray 15" 2.9 1TB 460 in stock and I could reserve it until I got there, I would brave Boston traffic to make it happen!
The crazy thing is I had one on pre-order less than 3 mins after pre orders started, but I cancelled it on Nov 4 after making the decision that I would wait until 32 GB of RAM is available. But after days of research, I'm of the opinion that while it's possible it could happen in 12 months, 18-24 months is far more likely. And then I read some of the exciting reviews here...and then I also heard from a professional colleague that does similiar work to me (I'm an assignment-based photographer and videographer) and he said that his new MBP was running very smooth while editing full-frame 4K video at 60 fps.
So here I am, pulling the trigger, again! If I stayed on course, I would be using it right now. Instead, my new delivery date is Dec 22-28. I think I'll drink some beeer tonight!