When I fire the Arma2 client up, after a fresh reboot it runs beautifully with almost all in-game settings set to Very High.
After about 30 mins of MP gaming, it's slowed down so that its about half the performance and then it will CTD.
I think there's a lot more to statements of performance in Arma2 than just "Its faster". What we should do is start to collate all this information with a standard set of criteria such as...
Performance in MP - First 30 mins
Performance in MP - Subsequent 30 mins
Performance in SP - One Mission - First 30 mins
Performance in SP - One Mission - Subsequent 30 mins
Or something along those lines. That way we can start to analyse the results and start to put a picture together of where the common break points are. Otherwise all we'll continue to see are statements like this one, that without any context are meaningless.