> changing the entire subscriber QoS because traffic to one particular destination is detected seems like too much work and doesn't really achieve anything usef

> changing the entire subscriber QoS because traffic to one particular destination is detected seems like too much work and doesn't really achieve anything useful Unless something has changed recently, the Speedtest site just acts as an intermediary between you and one of the "volunteer" servers that actually perform the test for the client. Since these are hosted on many networks, it's conceivable that this is the easiest way to QoS the speed tests.