For three days now I have had absolutely terrible connection speeds making playing online impossible, I can't join any game or when I can it's extremely laggy. Yesterday I managed to get in-game but I was unable to use my microphone as when I did my ping would spike up from 50ms to 600ms! Page's take ages to load up too.
Just changed over my filter, no difference in upload speed, my download speed shouldn't even be that, it's usually 280KBps which is around 2.1Mbps..
Have you tried connecting directly to the test socket