Perhaps the E3 Ambassadors will get to give E: D a go on DK2, and be able to report?
Not on Twitter personally, but perhaps someone who is could ask nicely?
I am interested in the DK2 myself an asked on both twitter and various elite dangerous facebook pages if anyone has used the beta with DK2. Unfortunately there hasn't been any responses yet. Perhaps Kerrash will say something about this soon in a tweet since I can't believe they'd be trying to demo the game in all its glory on a DK1.