Don't most servers throttle how much bandwidth outbound traffic gets? I never expect to get full speed downloading a random file. Even a super popular torrent might not have enough peers to reach full potential before it's done downloading.
I remember never getting more than a fraction of the speed. Like maybe 200 mbps max on a 500 mbps connection when downloading a file. I assumed with the number of people with gigabit connections two years ago I’d have at least run into a few servers that didn’t throttle that low.