yes it is extremely bad today,,,, and no its not your connection it is SL because many avatars from all over are experiencing the same,,, with each progressed step comes two backward ones.
I am on cable, 120mb download and 5 mb upload,,, more than enough for this game and I have stayed a cloud most of the day,,, listening to people whining,,, so it is not your connection,,, SL servers are running at half power more like.