I did the transfer yesterday. I was off the aircraft, through transfer security and back in the departure lounge within 15 minutes. Security had no passengers going through it but sadly the Lufthansa lounge was closed.

I had prepared myself to end up on some transit to T3 and back but all I needed to know what that there was a transfer facility within the terminal, making my back-to-back points run super easy, with time to buy some dates.