I just passed the 1k mile mark on my 4xe today. I've been tracking mileage on fuelly.com and haven't reset my trip B info yet so I could gauge what percentage of gas vs battery I was using. As you can see 24% of my miles came from battery power and the rest from gas.
The Jeep reports my overall mpg at 24.0 which is pretty close to what Fuelly calculates too. I'll try to update this again around 2k miles too.
For what it’s worth to anyone… today was the first time I got 24-25 miles out of battery life in hybrid mode. Mostly highway miles, 55-65 mph. Was usually getting 22 miles but that was 30-55 mph driving.