Although I have never tried QJD in China, I can confirm at least the chefs for preparing and slicing the Peking Ducks are sent over from China. At least some authenticity there, actually it was confirmed by my friend's father in law who is the chief chef at the restaurant.
Hype? Yes because of the brand. They charge more because they can. A Peking Duck costs $108 versus a more regular place that charges $38. Could I taste the difference? Not really. It's definitely more upscale and you come here because you're taking someone important out for dinner. The experience is different, the chef that slices the Peking Duck comes to your table and beautifully prepares the duck for you.
To be honest, I felt the food was average, definitely does not live up to the hype it has generated. The Peking Duck wasn't any special. The lobster was average, I didn't even know why I even bother to order lobster at a Peking Duck place.
Lots of private rooms for those special family dinners, a typical of restaurants in China.