I did a quick research amongst James' day-by-day reviews for fuel econonmy numbers he got over the last litte while in other vehicles:
4-cylinder engines
GMC Terrain 2.4L: 9.8L/100km
Jeep Compass: 12.5L/100km
Suzuki Grand Vitara: 12.0L/100km
Dodge Journey: 9.9L/100km
Honda CR-V: 11L/100km
V6 engines
Honda Crosstour: 11.7L/100km
Suzuki Grand Vitara: 11.1L/100km
Lincoln MKT: 13L/100km
Volvo XC60 T6: 12.1L/100km
Buick Enclave CX: 12.7L/100km
Ford Flex: 13.4L/100km
Honda Pilot: 14.5L/100km
Nissan Murano SL AWD: 12L/100km
Ford Taurus X: 14L/100km
Toyota Highlander 4WD: 11.5L/100km
Subaru Tribeca: 14.5L/100km
GMC Acadia: 15.6L/100km
I'm not sure what to make of all this, but I suppose I meant to show that I was surprised to see James underplay the fuel economy displayed by the Sorrento when amongst the vehicles with similar engines and AWD, only the Highlander performed slightly better over the Sorento. Some were close (Murano, XC60, Enclave, Crosstour), but many of them were much higher (Pilot, Taurux X, Acadia!, Tribeca).
Frankly, it's the choice of word James made that is confusing. A think a little more context to his statement would have been beneficial... maybe compare it to a few other vehicles to see how it fares. Only comparing a vehicle to its published numbers is useless and greatly misleading.