(although it seems blues never posts anything negative on Sony so maybe it's just what it is with this site)
That's nonsense, Blue posts pretty much all news he gets good or bad for whatever company. When Sony had the big PSN hack we had several large stories on it. Sony just has improved their messaging so there hasn't been as much "negative" to comment on as in the past. Microsoft gets bad PR because they spent the past year literally fucking up their hard earned reputation in almost every way imaginable.
Blue doesn't read minds, if you see something that isn't posted then send it in. Just in the past few days we've had stories on Amy Hennig getting forced out of Naughty Dog, SM studio closures and Sony having layoffs at other first party studios so I'm not sure where you even get the idea that there is some sort of overriding brand preference here.
Based on your wording I suspect that you have some brand preferences of your own anyway.
You are absolutely 100% correct, I do have a brand preference. It's called the PC master race™