Napilopez
Smash Lord
It may also be the fact that hitboxes do travel. Like marths fsmash may come out on frame really early, but it has to travel all the way down. It may be an extra 10 frames before it reaches its final location.I think djbrowny is off on that one since I find that the firs hit of the Ftilt is a frame or two faster than the Dtilts hit. So not really sure.
Like personally, ftilt feels quicker, but that may just be because it reachers a certain range quicker than dtilt does. Dtilt probably only hits on frame 6 from reeaalllyyy really close.