Yesterday, Microsoft called Google a liar. Today before the U.S. Senate, a government agent agreed.
The dispute hinges over a security certification called FISMA, which is required for some government contracts. Google has maintained that Google Apps for Government was FISMA-certified. Microsoft uncovered a court filing where the U.S. Department of Justice said it's not.
Google explained that the DoJ was looking at a small technicality. Google Apps Premier was certified by the General Services Administration (GSA). At that time, Google Apps for Government didn't exist yet.
But Apps for Government is a subset of Apps Premier, and is MORE secure. So Google said it "believes" that the certification covered Apps for Government as well.