Throttled is still unlimited in the same way as any other connection. Your connection is always throttled, it's just a question if there are two different speeds with the latter triggering after a particular threshold.
On many carriers you get only 2G speeds after you hit a certain point. I consider that disingenuous and deceptive to call it "unlimited" data when 2G speeds are basically unusable for most modern apps.
Throttled is still unlimited in the same way as any other connection. Your connection is always throttled, it's just a question if there are two different speeds with the latter triggering after a particular threshold.