I suspect Microsoft rolls them out about as quick as they can. If they don't they know the hardware makers will blame MS. But at the same time, I hope Microsoft runs them through a small battery of tests to make sure they are compatible with the standards, and Windows. That said, there are 1000s of different manufacturers making many 1000s of components. It would take some considerable resources and MS surely doesn't make any profit from that testing - other than not getting blamed.