I've had my retina Macbook (1.2/512) for about a week now, and I've noticed multiple audio dropouts when streaming iTunes music to my Airplay speaker. I haven't noticed any other wi-fi performance issues, and connectivity seems to be fine even during an audio dropout. Other devices on the network are not showing dropouts. I'm using an older (second gen?) 802.11n Time Capsule and have seen dropouts when my Macbook is connected to both the 2.4 and 5GHz channels. Has anyone else seen issues like this?