I think this attitude stems from their lack of an editor dedicated to that subject. Their Android/Google reviewer, Ron Amadeo, is the farthest they stray from the dominant Microsoft/Apple ecosystem. If you've ever wondered why their coverage seems so slanted, just look at the overwhelming number of MacBooks in any of their "what's in my bag" posts.
http://arstechnica.com/gadgets/2013/01/ars-ces-gear-its-tota...