To be honest zooker its not that uncommon its just that those of us that work in those levels ie FL100-FL200 don't make that much fuss about it until the props ice is banging off the hull.
Its just like with tasty directs over multiple sectors I always like to say how much fuel we have just saved due to the hard work of the controller getting it for us.
I have had a few times "how much" when I have told them "you have just taken half of ton off our fuel burn" which was down to scottish controller jigging us up with an east coast routing to St Abbs instead of foyle down the west and back across to the east from Wick.