Yeah. Arguably any time the motorway is clear the middle lane is the safest place to be. It gives you two directions to swerve in the event of a truck tyre, deer, dog... or if you have a blow out you have twice as many options in trying to keep control of the car.
The incidence of dogs, tyres and blow outs on the motorway must be pretty low (I've never hit anything on a motorway or suffered tyre failure on one in 25 years) so I doubt the increase in safety is really significant.
However, it probably makes you feel safer which is not necessarily a good thing.