It kinda makes sense... the first two ads were all about Bill and Jerry reconnecting with "real people"; in a sense that is what Microsoft is aiming to do. I guess as an introduction it's not a bad strategy, but I'd still like to see more ads with the two paired.
really doubt they got pulled, do you realize how much work goes into each ad and how long ago they were probably made. If they are moving onto something else then that was decided way way way before people saw these ones..
I'll wait and see what happens and see if its any good vs analysing thin air..