I read what you wrote, tried it out and found the new option isn't ready for prime time on my iPhone 6S+ and rMBP. On the former, I had no sound in the buds and the connection kept dropping. On the Mac, also no sound and dropped connections plus borked iTunes. I could hear electrical "ticking" very faintly, and didn't want to bork the Pods.Finally, double tap for Airpods is working. go to General>Bluetooth> Airpods info> and bam change the settings. double tap to change tracks instead of siri.
I tried "Siri" with the right Pod and "Pause/Play" with the left Pod, tried no other combinations.
Finally got the Pods working again after removing them from both devices, rebooting my iPhone and repairing it with the Pods. My experience was "hell no!" but YMMV. I'm holding off on trying this again or after a FW update comes out for the Pods. Cheers, and thanks for the tip!