I hold a Model 3 reservation, and received a call from the local store asking me if I was really, really sure I wanted a 3 when I could pick up an S this month. They offered me a 75 downrated to 60 in my color (exterior and interior) of choice, with all the bells and whistles (leather, a/p, etc etc) for just a 30% premium over what I expect to spend on the Model 3 in the summer of 2018, with very advantageous terms.
I was sure the Model S was too big to comfortably share my garage with the other cars (all family cars live in the garage...it's the law), and the "calculated fuel savings" estimate Tesla (mistakenly) includes in the final price bears no resemblance to my reality, but I have to admit I was (and still am) tempted.
If it worked on me it must be working on a whole bunch of people.
Robin