Rubber banding issue here as well. Makes it impossible to heal any boss fights in level 50 instances. Even walking around in the world people move for a few seconds, stop, and then jump forward. Didn't have this issue through all of phase 3 and 4 of beta and through release until this past week. Must be something that was done in the patch.

ISP- Cox Communications (Cable)
Location- Surprise(Phoenix, AZ)