I know this is an old question, but online chess and over the board chess for blitz, lightning and sometimes quick games are not the same type of game. I shall explain why.
Premoving a skilled player in lightning and blitz as the clock runs down will bite the honest skilled player much more than a less skilled time player with low rating. It will never reflect their weaker over the board play.
The first big reason is that we get to see them pick up their piece and make a bad sac. The idea of “bishop takes pawn for zero compensation followed by premoved castling" will never happen in over the board. It only happens in online lightning time scrambles.
This alternate playing style allows a less skilled player to play in a nonsensical fashion and refute your premoved skill play. Over the board play, on the other hand, makes a decent player unable to premove without fearing premoves and quick rating loss.
I am master level chess player, and yet I’m a 1900 rated online lightning player. Over the board lightning players I crush are people I know, and they beat me online doing the same thing.
If both players do not use premove, the contrast between not seeing a piece touched and moved to a square and the time delay to place it on the a square makes a large difference.
The next big reason is the mouse move. The speed of the Internet connection, such as lag like on chess.com (where I’m rated 1900 in lightning and 2240 in blitz), the piece I move delays as it hesitates every singe move.
In conclusion, do not view quick online chess as anything comparative to quick over the board games, as they truly are NOT the same thing. The longer the game, the more comparative to over the board it becomes. End rant here. :)