Chuck,
I believe your right about OTV and it's value. One thought, if OTV is to be implemented - it should be done within the Data Center or VBLOCK environment to be effectively quickly.
Why ? Because it can take carriers years to test and adopt a new technology such as OTV into their managed services.
If OTV just appears as a layer 2 feed to the Carrier Network, it can be implemented immediately and the benefits can be seen quickly.
food for thought,
Ron Howell
large carrier engineer
919-949-3513