Laura Rola from Turn A Gundam!! That was bugging me.......havent seen that one myself yet though
We've never had any letters from our ISP (mainly due to my paranoia and reluctancy to go near the limit), but our speeds are terrible from around 5 PM until 11-12. During the day and late at night it's fast enough though.
Check your traffic management policy as unlimited never means unlimited. There will be a fair usage policy, and you may find you do have a limit at certain times regardless of whether your on an "unlimited" package or not.