I noticed slow server responses yesterday, and I am notified by users that it is slow today as well. The maximum transfer rate seems to be very slow at the moment. The server hosting I'm using was able to trace the issue yesterday and they improved it (it was due to some of their providers, they had some significant packet loss), yet the problems reappeared today again.
Current server is in USA. I'm going to move to United Kingdom as soon as I get a quote from sales ...