I question their 'brand' metrics. In terms of market value of course MS certain beats the other two consistently. Their XBOX division however, not so much. Regardless of these articles merits. Other 'brand' metrics put the other two above XBOX. I question the validity of that too without delving deeper into the methods.
Personally I would find mindshare and pure sales (over multiple generations as well) to be the better way of measuring whether a Brand or division is doing better and has more market value over the long term.