Just an update for those interested. I'm Qantas platinum/OWE and two days ago I flew from MUC to TXL.
I got access to priority/business check-in and fast track security. I was given access to the BA Galleries and Atlantic lounge. And finally I was given access to that little boarding area setup they have, although I suspect the AB guy would have let anyone in as he didn't even look at my BP or OWE card.
I'm returning from TXL to MUC tomorrow morning so it'll be interesting to see what happens.