A few hours ago mine dropped to 500Mbps and double or 3 times normal ping to LA, now it is again at 1.2Mbps.  National speed is around 5Mbps which is down from my usual 7.3Mbps.  The other day I did a speed test at 3 in the morning and international was really fast, so there does seem to be a bit of a problem at the moment.  Popular sites are cached and thus appear to be fast, e.g. Microsoft updates.  Two days ago I got over 7Mbps downloading 200MB from Microsoft at 8pm.  It would be good to get some feedback from XNet...