WinVPS2 is being slow again, and it seems to be using large amount of cpu by the system process. This typically means a VPS entered a locked state for using too much RAM and trying to restart their VPS. I am working on it now and may have to reboot the host node to resolve the problem.
Just as an update, throughout the slowdown there has been 2 client VPSes that are down, other VPSes are running a bit slower than normal but are up and running.