Actually a pretty impressive about-face from Microsoft. I know some people are all-too-ready to see the demise of Microsoft, but I'm glad to see them try their best to be nimble. The more they fight for eyeballs, the more we win.
In the same way a supertanker turning with a turn radius of 5 miles is "nimble." Microsoft is a big place with a lot of entrenched products, processes, and policies. Being able to change those to enable shipping this product is 'nimble.' Continuing to not adapt to the way to the way the world is changing would be "non nimble."
Personally I think it shows a lot of growth on Microsoft's part, and that is a good thing.