The only module causing FPS issues (when I say "issue", understand "less than 70 FPS", relativity stuff...) is MiG 21 Bis. All other modules I get are something like 120 FPS in flight and around 40 to 70 on base.
Just impressive, was used to slideshow, now I don't understand when I have less than 50 FPS :p
Really MUCH better.