It's way too accurate.  It always has been, but the added numbers make it worse.  It consistently hits small fighters from half a mile away while they are maneuvering hard at five hundred miles per hour and travelling perpendicular to the anti-aircraft guns.  That just doesn't happen in reality, even with radar guided guns.
While I understand the desire to have bases protected from vultures, I must point out that it really makes small dogfight servers absolutely miserable.  Last night I was flying in a room with only four bases, and the opposition did nothing but hang out over their base.  Every single time I tried thundering in with a lot of airspeed (you know, to keep from getting hit by flak - yeah right), I got toasted by the flak in a matter of seconds.  Very frustrating, that is.  It's especially so when I'm being very careful not to fly straight and level, low and slow, or close to the triple-A guns.