Wing and I like to compare fuel econ numbers, because he lives out in the sticks and does most of his driving on the highway and secondary roads, while I do most of mine in the city. I think his result in the Escalade is decent, because, as he told me, he spent most of his time in that truck flooring the gas to hear the S/C whine.
(I didn't drive this truck.)
What he didn't mention in the review is that the plexi panel in the hood fell out - thankfully, not while he was driving it.