Does System State Backup support incremental backup in Wİndows Server 2008 R2

Hi Gurus,

on the following technet link Microsoft mentions that a System State Backup does not have an incremental support. An this article applies to 2008 R2 too.

Applies To: Windows Server 2008, Windows Server 2008 R2
Backing Up Active Directory Domain Services
http://technet.microsoft.com/en-us/library/cc816584.aspx
Feature  System state backup
Has incremental backup support No*

Below, a Microsoft employee on technet blogs mentions that 2008 R2 system state backups are incremental.

http://blogs.technet.com/b/filecab/archive/2009/06/22/backup-version-and-space-management-in-windows-server-backup.aspx
New in Windows Server 2008 R2 system state backups are incremental and use VSS shadow copies for creating different versions of the backup.

I would really appreciate if a an MSFT can tell me which one is correct.

With kind regards,

Cengiz Kuskaya