I was watching a bunch of Model X videos from 2012 when it was revealed and in one interview Elon Musk mentioned that the Model X has an amazing turning radius, comparable to a MINI. I initially thought that this was because of the two motor, AWD system. But I'm thinking that if the rear wheels don't steer then a MINI-like turning radius won't be possible. So, I'm thinking that the Model X might have all-wheel steering (not just AWD) so the rear wheels will steer when needed to help increase turning radius. The overall effect will be that the Model X will feel like a much smaller car to handle, especially in parking lots.