Northern Europe here, just trying out Crashplan (free trial) using the docker version so my short feedback might not be worth that much yet...
Pretty consistent 4-6 megabits/s speeds to their servers throughout the first eight hours of upload. My connection is a 100/100 megabit/s connection and not much was competing for bandwidth during those hours, so probably as good as it gets for me. Haven't tried restoring anything yet.
Uploading everything on the server will take more or like "forever". I would of course have preferred 4-6 megabytes/s over 4-6 megabits/s, but if it works reliably in the background I might just continue using Crashplan anyway. The vast majority of data on the server would just be inconvenient to lose, not disastrous, so a reasonably cheap cloud backup is very tempting.