Same exact issue here. I am unable to stream slingbox above 200kbps during peak times. Before October I was routinely streaming at 4,000kbps! I will be switching to cablecom as soon as my year it up.
I have experienced the same exact problem, which started sometime in October. When i test my download and upload speeds via speedtest.net they seem fine however I am exeriencing severe issues with my actual download speeds. I called Swisscomm several times however they keep telling me that the issue is not on their side. It took over 4 hours to download a movie from itunes. I am also experiencing issues when streaming from slingbox and downloading PS3 content from Sony. I highly doubt that the issue is with the Sony or Apple servers. What is going on Swisscomm? Please address this issue.