There's a reddit user who works for Frontier who comments about IPv6 from time to time. What I've gathered from his comments:
- It'll be a /64 prefix (confirmed by others who have already gotten the roll-out)
- The delay has mostly been waiting on some sort of licensing deal for their equipment
- The ONT needs to get an update pushed to it (probably done as part of the roll-out, but I don't know how to check)
What kind of router do you use?