I think he defended his own wallet more than anything, didn't he say he had quite a lot invested in both companies? If he somehow is associated with MS with a purpose to "spread the good word" he pretty much succeeded in doing the opposite IMO.
That's obviously the case with everyone having an inherent, obvious bias anyway. Most members have some sort of preference but you can sorta tell which ones are "normal" forum dwellers with a favourite console/platform and which ones are arguing from some sort of semi-astroturfing perspective. In my experience it's the complete lack of humour that gives them away.