I have a Leeza and a B & K Ref 20. I really dont notice any delay and to be honest, I dont look for one. I sometimes see some really weird delays when watching directv (sat receiver audio goes through the B&K) especially when watching the network channels, though usually when watching the East Coast feeds (I live in LA). ABC seems to be the worst. In anycase, it really annoys me so if I do have any delay with the Leeza, either its really small or I ignore it
As mentioned before, the b & k Center does have a delay, but i think it maxes out at
20ms, which from what I read on this forum, is not a lot