Comment Sync vs Useful rates (Score 2) 228
I know DSL, being an ATM-based technology and often subjected to PPPoE overhead, will score lower than rated. I have a 5 megabit connection but that's the sync rate. You can realistically expect to lose 9-10% just from the above overheads. That rather fits with the graphs I'm seeing.
I've seen some ISPs compensate by setting the sync rate above the advertised rate but most don't.