I'm having constant buffering issues while watching videos on YouTube, or watching a live stream on Twitch. My speed is shown to be at a stable ~100mbps download, and I'm on a wired connection. Surely a 100mbps can handle a 1080p 60fps video/stream.
#1 Try this testing site and report back the results.
#2 What is the brand and model of your router?
What state are you located in? If you play games, do you have problems with data delivered over the TeliaSonera network?