Gee, I wonder why...
You say PC sparrers never complain and iDevice sparrers always complain. You think device users are stupid for thinking PCs have an advantage or are more difficult to spar. Yet 90% of device users believe this... Last time I checked stupidity wasn't diagnosed as a contagious epidemic; nor has intelligence ever been related to the client-type you use (in short, mass complaints like this must have a basis). iDevice sparrers actually make use of the iDevice tournament room, but the PC tournament room is always empty... Just a few observations.

Now my own opinion. I dont care about how much / little PCs lag. Yes, PCs typically have shorter latency, causing delayed hits for the other, but its usually do-able. I just dont like sparring certain PC players because most of them overuse slide movements that arent even possible for iDevices. Honestly I dont see why this wasnt fixed in the last two years. Its not logical to be walking and facing right but actually moving straight down.