My LBS IS handling the warranty - they'll send it back for me and get a replacement. Unfortunately they said sram isn't terribly speedy so I'll be on another bike for a while.
SRAM will send the replacement to the shop, and the LBS can swap them out while you wait. It's like a 10 minute job to pop the quick link, install the der, set the high and low limit, pair the system, and get it trimmed.
(15 minutes if they bother to put a der alignment tool on while they have the hanger bare. You should make them bother, because, 5 minutes to know it's right).
That's what they did for mine.