Not that it actually matters; I play each game on its merits, and based upon the conversation in this thread, have found several people who I would prefer not to play with. My goal isn't to improve my GR; it's to be a better player. Slowing a game down for no in-game advantage simply isn't a reasonable tactic, and it's absolutely *not* a fair response to somebody who stabbed you to death.
The cardinal rule of Diplomacy is that when the game ends, it ends. You have signed up for a situation in which people will lie to you, stab you, treat you unfairly, and expect you to try and do the same to them. Sometimes, they'll do so for reasons you disagree with, and it will end up poorly for both of you. If you cannot handle playing in such a game and walking away with a smile on your face, you shouldn't be playing this game. And part of that means you're welcome to fight to the last, and probably should, but the moment you're dead, you respect the other players in the game who have beaten you and let them continue playing, and if there's a discussion afterwards, try and avoid saying anything you wouldn't say at the end of a face-to-face game where you need one of your fellow players to give you a ride home. If you can't manage to do that, I'd be happy to suggest some other board games that might be better suited to your temperament.
Does that mean I'm never the last player to enter moves in a game? You will, often, catch me submitting orders and not hitting ready immediately in gunboat games. Why? Because in a complicated tactical situation, I've found it valuable to enter my instinctive moves immediately and then come back to the situation fresh, which in a live game typically means that even with 17 units on the board I'll have a set of moves within ~45 seconds, take about a 60 second break doing something else, and then analyze the position. I also sometimes write a new set of orders and don't hit save, giving myself until the deadline to either submit the new set or not depending upon my analysis, so when that happens, you might never see me hit ready unless I manage to get myself off the fence between the two sets before the deadline. But, I can promise that any time I am certain of my orders, I hit ready, and in addition that in an endgame situation where it's clear that my choice will not affect the outcome, I'll also hit ready. And, I've found that I'm rarely the last person to submit orders in situations where I have the most units on the board.