if it takes you 2 sec to send/receive a packet to/from server, then it will take you 2sec to be able to cast the next mudra, instead of 0,5sec.
there's not much you can do about it, except use Battleping or WTFas...i don't really know SEs opinion about such programs...but it's stupid that you'd need to pay for extra services, just to be able to play the game, as it should be played.
Why can't SE set up such a network?