I'm not sure a class of its own is a fair description. A smart machine yes, but to counter your example on burn
A king air 250 gives 300 kts for 540lb per hour total in the early F300s.
With two engines.
So I'm not sure what class the PC12 is in on it's own. Apart from the 'private use only' class or the 'watch out for long over water legs or remote terrain' class
