I was in Mississauga (Erin Mills/Square One area) yesterday from 12 - 3PM and had LTE coverage. Used WiFi for the rest of the day. Went back to Oakville that night, and I haven't had LTE coverage ever since I was in Mississauga. I used to be able to get about a minute of LTE coverage when toggling airplane mode on and off, but I get nothing now.
I called Apple just for fun, and they have no notices for this issue.
Called Bell right after and the service rep told me that there is a "nationwide service disruption" for all iPhone 5 users. He said it will take a few days to sort out due to the high volume of iPhone 5s being activated.
Nice to know that it's not just me, but I'm still disappointed. Maybe Bell will make things right and credit us somehow... its nice to dream, right?