No, not yet.
When the software is officially launched, Help files will be available.
There's information about new and changed features on these pages, including links to comprehensive video tutorial series about what's new:
what's new and changed in Premiere Pro CS6: http://adobe.ly/HDKYpx
what's new and changed in After Effects CS6: http://adobe.ly/HCGNMJ
what's new and changed in Audition CS6: http://adobe.ly/Hz45o8