fyi, i have the exact same problem. I have a slingbox set up in the US and also have had issues with speed during the evening hours and on weekends. I test from work and get speeds around 2.8mbs, using in the evening i am between 200-400kbs. When I first moved here in September 2010 my speed was consistently 2.8mbs which I believe is essentially the limit for my connection coming from the US. I would like to switch to Cablecom but that is not an option here unless I paid for a new set up. In addition i noticed recently, although it could have been around the timing you are indicating, that I can now get HD channels. Before I was told that I could not get them in my location, so something has changed in the last couple of months. Perhaps this is also a change that is restricting my speed. i have slingbox for ipad also and have tested on multiple computers. It does seem to be the Swisscom internet and an issue on their side. I will switch at the first opportunity if this is not corrected. And I also tested my speed using the global speed test with good results 12 to 15 mbs, so I should be able to stream at 2.8mbs like I can from work.