I think the performance varied from device-to-device and from site-to-site. The heavier uses tended to perform worse, the flash games designed for mobile tended

I think the performance varied from device-to-device and from site-to-site. The heavier uses tended to perform worse, the flash games designed for mobile tended to perform much better. But it's really moot, flash on mobile didn't fail because of quality, it failed because it wasn't on the iPhone. A cross-platform runtime that's not cross-platform is pretty worthless, no matter the quality of it.