Normally I don't make excuses, but seriously that first and second match were horrible for me. Having so much slow down lag with Marth killed me. I couldn't do any of the moves at the correct timing I wanted to. It severely hindered my ability to play.
With the input lag with Link, I couldn't time my arrows correctly, nor could I get my smashes done right and just doing tilts instead. I also could never get my teching done due to the input lag as well, which would have helped a lot in what I was trying to do.
edit: The third match was more close to how I actually play. I started off slow due to not knowing whether I had to adjust for lag. Since it was mostly not there, I finally got into it. I would have went for more gimps, but I was afraid of any lag spikes that would get me killed.