Many of them in the field couldn't hit the factory numbers, so in this case selective realism works in the LW's favor.
Funny, there is a RAF report about the "poor" quality of spitfires.
The RAF leaders were pretty pissed when they noticed that the production planes were up to 40mph slower than the manufactures data.
Even after removing some parts and reduce the overall drag, none of the tested productions Spits hit the factory data.
The PRO has the report, but i don't know the document number.
Also there exist german test of captured allied planes, and none of the tested planes matched the numbers given in the literature.
(I can't get a copy of that, cause publishing those things is restriceted)
But i am sure the test data of allied planes in germany are pure propaganda, while all RAE comparison tests are 100% accurate and true right?
For all planes AH works in favour to the factory data and not the actualy production planes.