I'm pleased with the type of mileage I'm getting so far anyway. Today just over 9 miles city driving getting 77.9mpg (UK - just under 65mpg US, I think). I think that's about 10 mpg better than I got with the gen 3.
Temperature and fuel gauge, and avg and trip distance are reversed over there... Could you post pictures from hybrid status gauge too? Nexus 10 ?
Here's a couple - one showing most of the console, and a close up with the hybrid indicator... Plus I got really good mileage on today's return journey from town! (122mpg UK, is about 101mpg US I think).
The steering wheel is on the wrong side! JK, but here's a good unit converter I use a lot. Unit Conversions
Wheel controls and hybrid display are the same, but gear selector display, gear shift, driving mode buttons and radio buttons are reversed as well. SM-N900W8 ?
Check your tyre pressure. On our 2010 Prius with 195X65X15 Michelin Energy Saver AS tires I keep all 4 at Max. Sidewall listed pressure, 44 psi. This will probably give you an extra 2 or more mpg's from 38 psi or. Also your tires will last longer in my expeirence. On my 2nd set nearly 70,000 miles on the first set with perfect wear and they are a listed 65,000 mile tire.