Sounds like bing probably represents better bang for your advertising buck than google at this point. Could be good deals there for marketers.
For microsoft's part, it just seems like they're always one step behind google, which is one step behind Facebook, which sooner or later will be one step behind someone else when they've maxed their revenue from their current business and feel compelled to stray from their core competencies. History repeats itself and the young grow old.
Also, thought it was an interesting bit about bing gaining marketshare from yahoo (their partner) and not google. Ouch.