Microsoft vs. Google: Who will be King of the Mail Hill?

Microsoft and Google are fighting for the email territory.
Some days ago, Google started a campaign to promote GMail.
2 videos have been released by Google.
The first one recommends to make the switch from the “email address you got when you first started using the Internet”to a GMail address.

The second one to help existing Gmail users launch an email intervention to make their friends switch to GMail.

Today, a Microsoft sales video from the Microsoft Global Exchange Sales Conference leaked.
In the video, Microsoft presents the GMail Man, reading everyone’s email to serve them irrelevant ads based on keywords found in their correspondance.

Did the Microsoft video really “leak” or is this some kind of undercover viral campaign?
In any case, the war is not over.