ManuTOO,
Not sure whether or not to post this separately or into the related topic, http://www.managames.com/Forum/viewtopic.php?f=13&t=2641. So, here it is alone for now.
I played someone today two Doubles matches. The ping was actually good (no packet loss at onset). During the matches, actually immediately at the start of the first match (the one 6-0 below was first), I kept noticing how my player moved extremely slowly at times, almost as if I were not holding down the movement buttons, but the ball kept coming. When the player would hit a lob, often my movement was so slow and sporadic that I could not move quickly enough to return the lob, which normally would not have been an issue. Hopefully the recordings will show this. You will notice on playback how some of my movement is very jerky or not fluid. I don't know how well the recording captured the movement issue, but when playing the game, it was very obvious (one moment everything is normal, then when I try to serve, I press down buttons, and it takes a long time for service motion to complete; or, everything is normal, opponent hits lob, and then my movement slows such that the ball is still coming, but I move two inches when normally I would have moved two feet). It is like if you were driving a car on pavement around a curve with no resistance and then maybe driving through several feet of water; you do the same things, but you feel as though you may lose control.
This fellow obviously was cheating with lag, whether that be by the use of a lag switch or an application I don't know. There are several desychronization errors, but these happens a lot anyway. Also, there seems to be an issue with many online matches where a serve when the up and down buttons are pressed with the safe strike button (fire 2) against the CPU player in Doubles frequently causes a desynchronization error. Sometimes, just the down button (top spin) and fire 2 serve causes this with CPU. In some matches, I may receive five errors in a row trying to serve to CPU player in Doubles and finally either have to fault the serve (give away the point so that I can serve to the human player) or use no effect so that an error won't be generated.
Well, I hope this helps. It's too bad that I don't have an external video.
Thanks!