Hi MetroMPG!
That's a great chart, thanks! (It's on page 6 for anyone else looking for it.) Are those this year's models?
I also recorded my mpg on the highway portion of my trip from work, resetting the gauge once I hit 65 mph, and staying between 65 and 70 for about 9 miles. The average for the dates when traffic was good (around the same time of the day) and the drive quite smooth (4 trips) averages out to 42.1 mpg. I tried to stay right in the middle of the two speeds, and always logged the data right at the exit from the highway.
That's about 2 mpg better than the chart. It might be lower than that, but the AVG mpg always flatlined at or just below 42.
Sorry for getting off-topic... over-excited new guy over here.