I did this yesterday while doing my OrundTheGlobe tour . I wanted to test endurance and it came pretty close to official numbers. Single pilot 90kg and 35kg of baggage in trunk. Aprox. 1774nm. Mostly at FL280-310 at 250kn. Once you bring her high it burns about 30-35g/h. I landed with couple gallons left.
Adding to what Cameron said, there are also many new datarefs coupled with new code.
So, essentially, this next update is considered a "bridge" to 2.0.