I also have a MacBook Pro with dual graphics, but I do graphics development and use Adobe products, so I ended up switching completely over to the Radeon.

I'd like a new Mac, but I'd really prefer to have something better than the basic Intel HDwhatever integrated graphics... Based on benchmarks, the Iris seems like it could be good enough for non-Retina MacBooks. But of course Apple has chosen to use it on the Retina MBPs where it's still underpowered. Sigh.