I reported this earlier in the thread.
I think I've pinned it down to something to do with mobile connectivity. When I download the music and play that from my iPhone 6s Plus, I get few stutters and drops. However, when I stream music over mobile from Apple Music, I get drops all over the place. Also engaging Siri also triggers drops for me too. I've swapped my AirPods and I'm in my third set - all displaying the same issues. I think this is why these things were delayed. As much as I love them, I just don't feel like they're ready for prime time. This must have been picked up during early development testing. I'm sure things will be fixed during an software update, but this is just disappointing.
Christian.Terra, is his a similar problem to you? Are you streaming or are you playing downloaded music?