Thanks for sharing your experience, bsheep, and for aggressively following up.
I hadn't pinned the actual lag time, but I'm seeing the same issue w/ the Rogers counter not updating in real-time. I'd surmised that the web-page was refreshed around 9 EST on business days, after a query to the database or something.
Since our younger family members have discovered youtube and torrents, I'm having to actively manage my connection every month to avoid the $$$ overage charges, but as you said, they don't give you the tools to do so.
I was thinking about going all-out (downloading a few TeraBytes) one month and just eating the $25 overage, but I'm more interested in changing ISPs if I can find a suitable alternative (e.g. TSi) that serves my area well.