I think some centers are different. I know at my center we bid start times not routes. They will try to keep you on the same route daily but if it becomes slow or they dont like someone you take what they give you.
True, most bid start times (not routes), but typically certain start times ARE associated with specific routes.
When the directive first came out, we were told it would be a bid - 11:00 start - with the target for these deliveries between 11 and 19:00, by appointment.
Again, as is typical, some managers do it their own way, counter to Corp. plans. This needs to be checked and balanced if they want this service to be successful. I would hope they don't discount the premium nature of the service, turning it into an afterthought.
When we first got a liftgate or two, it was used as a punish route, to some extent. That was a bad idea. One I remember well...