[Rattlehead]

Massively improved from when I bought the game.

Playing at 1900x1080 resolution. Grass, roads, forest etc. all on. Building detail set to low.

At present I can fly at rooftop level over London and Caen at mostly medium settings without too much bother...about 18-30 fps over London, but it seems pretty smooth. No stutters. Even 6 v 6 dogfights at low level over the suburbs of London is fine, with the odd very slight stutter here and there. Nothing serious though.
Over general terrain and water the game is smooth as silk.
At about 3000+ meters, I start to get frame tearing, which is a good sign.
In general, I can chuck up about 24 planes and have a nice dogfight at low altitude.

My issue is that my cpu can't handle large flights of bombers being intercepted (20+) without significant pauses and stutters. When bombs hit their targets things go downhill fast.
I'm hoping to upgrade my cpu sometime this year.

Overall, I'd say the performance is fine.