Lazs, you are correct about AH's gunnery being modelled correctlly from a ballistics/damage POV. However AH does not simulate buffeting, turbulence, wingtip vortices, propwash, barrel overheat/wear and jamming (both factors in firing long bursts), and other R/L factors that made gunnery very difficult. See some of the LW guncam footage posted on the BBS and notice how the LW pilots are having difficulties hitting B-17's from a dead-six position. All the propwash and turbulence making their fighters bob up and down and sway sideways.
AH's flight model seems quite accurate when considering a stable (one direction steady wind) standard atmosphere, but dogfighting was a lot less "stable" experience.