It's not bizarre logic in the slightest. If one console is easier to program for, I would have thought it safe to assume it's easier to get more power out of it early, before developers have had the chance to fully understand each console inside and out. That's actually fairly simple logic really.
If you read the interview with Cerny about the PS4 hardware he explains that it was intentionally designed with a lot of advanced features (on the GPU side) to be exploited later, so there could be more to come from PS4 actually.
Both consoles should improve over time but Xbox One will never be able to bridge the gap in GPU power, it's much too wide. If it can't do 1080P as standard now I doubt it will ever do it as it requires a significant amount more rendering power.