as a side note your post is a testament to how successful Mark Cerny's communication campaign is at least on the web, all of sudden the Xb1 is a complicated system to deal with.
That is imo a felony, it should be easier, significantly easier to work with than the 360, relative to the resolution the scatchpad is bigger than in the 360, it is accessible to the GPU and so on.
Then there is the API and the tools provided by MSFT.
Imo till we hear serious complains about xb1 it is safer to not byte to hard into Sony communication campaign, the PS4 is super straight forward, the most straigh forward console ever, but it says nothing about the competitor machine being a hell to code for.
I don't think it will take much more time, if at all, to port to Xb1. At worse Devs will make a non optimal use of the scratchpad.