If you had the v 2,1 MBA with the Nvidia 9400m you would be much better off for these sorts of apps. The original MBA had the Intel 3100 at 20% of the power of the Nvidia 9400m. I would keep these sorts of apps away from the original MBA, personally. The original MBA might do the same stuff, but it will definitely work a lot harder and take a lot longer. Probably have to live with the extra time unless you're willing to upgrade.
It would be great if the capabilities were expanded with the next MBA. Another 25% gain in graphics powers with an Nvidia 310m would be wonderful, and we could get great battery life using Optimus to manage when the dedicated graphics get used.