I asked a friend to play naive and ask some question about the NX at the Samsung booth at IFA (entire hall 20, actually).
She got mixed answers: "Coming October", "coming January", "don't know, we got no instructions about it", "it is a concept, not sure if it will come" ...
Asking if she could use "her" GX lens, answer: "Maybe" ...
Asking if she could quickly try it out
: "No way, it's just body shelves, empty inside" ...
Working in the marketing department of a huge corporation, she found all of this "shockingly unprofessional"
She was much happier when going to the Sony booth and firing an AF.C burst with A550 into a model railroad train leaving a tunnel (she was amazed that all shots were sharp). I told her "no problem for a K-7" -- did anybody try?