It's also possible that the route between Numericable and Netflix is insufficiently provisioned, unlike the route from Numericable to your SSH server to Netflix

It's also possible that the route between Numericable and Netflix is insufficiently provisioned, unlike the route from Numericable to your SSH server to Netflix, which can have more capacity. What I mean is that's probably not an intentional throttling. Anyway, it's still a bad service. I have a similar issue sometimes with SFR...