...statistical snippet...
At least by killstats the K-4 has been all over them in all of 2011, and largely the G-14 too. The K-4 had an impressive K/D of 1.4 ( 20,995 kills to 14,905 deaths) vs all UK+US fighters, the only real exceptions being the F4U-4 and -C and the Tempest.
... statistical snippet...
Yeah, I think that has more to do with pilot skill than the plane.
I mean lets face it, the spitfire IS a noob ride. It has a relatively high number of new or lesser-skilled pilots, largely because it is very forgiving, and almost coddles the pilots. Same with the P-51, for a combination of being the most famous american fighter, and because its also fairly forgiving.
The 109's, on the other hand, are not at all forgiving. Even the K4 can really only run unless the pilot is both fairly skilled and fairly experienced with the K4 or another later model 109. The balistics are poorer or, in the case of the K4's 30mm, just terrible.
This means that newer pilots are going to be pushed away from it. The K4 also draws some of the better sticks, because of its high skill ceiling.
And regardless of how much it was used, or if its perfectly representative of post D-day WWII, 150 octane fuel is still a bad idea for every fighter save possible the Spit 14.
Why? It will make allied fighters MUCH more prevelant in the MA's, and it will completely screw the axis out of any chance at winning a post D-day scenario.