I purchased the Visa and picked it up last weekend. I compared an actual picture to what I posted earlier... the gap between them is a little bigger than the "concept" photo. Obvouslly not good for aero.
I kept a close look on the MPG on the way home. There was a 30mph'ish crosswind most of the way.
Highway averaging 63mph: 10.5 mpg
Reset the onboard computer and drove another 30 miles off the highway averaging 53mph; 11.5mpg
The entire trip there w/o trailer; 69mph avg, 24.5mpg.