except there is no deal, it's just xbox being salty and trying to imply that Sony signed an agreement with Game Science when the devs have already said that there's no exclusivity terms.
Well, there is no proof there is a deal but there's also no proof that there isn't a deal. It's a 50/50 chance either way, statistically speaking.
The fact MS feels the need to keep saying that line, though, shows they are extremely petty, childish, and being rather unprofessional in the whole affair. If they didn't have a bottleneck in the Series S, chances are their platform'd have this game Day 1.
But they don't want to openly admit what a mistake designing & releasing the Series S turned out to be for them. So, we get....this :S