Good (but bad) to hear similar reports.
SG player here on NA servers, ping has always been 100-200, playable, but in the last 2 weeks it's been spiking to the range of 300-1,000.
Makes sPVP almost unplayable as enemy players just disappear then teleport next to me casting skills, no way to block/reflect in time because I don't even see them coming.
Apparently they see me perfectly fine though.
Was just about to experiment with a transfer to an EU server but it doesn't seem any better.