I think some people don't understand what the guy is saying.... he is not talking about secret hardware and not talking about dev teams getting used to the console...
he is talking about MS giving more access to dev over time or to code closer to the metal however you want to put it... which is completely different to getting used to the console and current dev kit and APIs and has nothing to do with hidden hardware... they could spend 20 years with the same console and know it like the back of their hand it wouldn't give them more access to the hardware if MS doesn't change anything on their tools or access rules....
and at that game like many pointed out about the hardware to say the PS4 is better.... MS is first and foremost a software company and they are god damn good at it when it comes to tools and no doubt better than Sony at that game... which could make things better for devs on the long run.... that said the hardware will stay behind the PS4... but software can add a lot too, if anything in overhead cost for the devs which can play a big role on executive decisions as business and therefor for the end result.... we have seen it with the PS3/360 last gen....








