Just been on my first run with this, and unfortunately my worst fears were realised. The Bluetooth connection is appalling. I was using a set of brand new Skullcandy Smokin Bud 2 In-Ear buds which work flawlessly with my Sony SW3.
This is such a shame as the GPS etc on the Moto 360 Sport is bang on.
If anyone has a fix for this issue, or perhaps can recommend a set of headphones that do work it would be much appreciated.