ArmA = quality... What? You are kidden us, aren't you? If there is one truth then that: Arma is n o t quality.
ArmA AI goes through walls, for ArmA-AI the gras does not exist, ArmA-AI looks through smoke from smoke-grenades, the audiblities of running persons (foot-steps, etc) are imbalanced (you can hear footsteps of running persons in the wood not before the person is 10 - 15 meters near you = absolutly unrealistic).
I can go on and go on with this list but this is not the place to speak about ArmA.
For me ArmA is one of the most bugged and glitchy game and so beyond doubt i will not give money for ArmA-2.
Apropos ArmA-slowness: thats one of the better ArmA-things because its realistic.
For me its simple like that: if a shooter is childish like COD4,Crysis, rainbow-6 vegas or other #### like that, i will not spend my money for this.