Surface Pro comes with Office 365 Trial pre-installed, could explain storage?

Was just looking around the Surface Pro product page on the Microsoft Store site, and I noticed that Office 2013 is pre-installed with a one-month trial of Office 365.

So that might explain some of the storage people were complaining about.

Source: http://www.microsoftstore.com/store/msstore/html/pbPage.SurfaceProAnnouncement