You can answer it yourself, rather than believe just me. Read the OFF forum at sim-outhouse.com. Search for multiplay.
There are regular multiplay sessions where gameplay is smooth. Trackir and teamspeak is used and special missions are written for multiplay sessions, some based on historical sorties, i believe.

As for not getting decent frame rates,Mogster, you maybe didn't setup the cfg file properly- a common mistake is setting it the same as CFS3, whereas the setting 3 in OFF is equal to setting 5 in CFS3.
Setting 5 in OFF will bring any computer to its knees.
I run Athlon 4000; 2 gigs ( was 1 ) RAM, nVidia 7800GTX and I get 50 FPS in dogfights at 1600 x 1200, 4AA, 16 aniso.
Best terrain and scenery ever.
Trackir 6DOF works perfect.


Mankind's problem is not failing to know the difference between right and wrong; - It is failing to know the difference between different and wrong