To quote my own profile (Octavious orifinally said it):
"Gunboat is a truly dire varient of the game that takes the soul of Diplomacy and pisses all over it. The moves are painfully formulaic, the style of play is so different from the true game that most of what you learn in one form is useless or, even worse, highly misleading when applied to the other, and at the end of the day almost every game is decided by someone who doesn't know a damned thing about gunboat doing something really stupid.
The Gunboat varient is only one step more enjoyable that the infamous Pacifist varient, in which speaking is allowed but moving units is forbidden and the winner is the last player to lose the will to live."
Most people play gunboat because it can be done quickly, but is only one half of the game. Yes, you can use the 'hidden diplomacy' of looking at the moves, but once EVERYONE knows that you can view the moves, then it becomes public press without the talking.
But if you look at the true setup of diplomacy: there is no dice, there is no cards, it is straight up math (higher numbers beat lower numbers). The reason? Because the game is in the discussion and diplomacy you make with the other players.
Gunboat isn't diplomacy. It is another game. Some people enjoy it, while I think it takes the heart of the game it was based on.
I honestly think it is for people that just don't want to do the 'important' part of communicating. They want a fast game they can just zip through and get their win or loss. It is for people without patience... people that want results now. Because of this, it is full of frumpy, emotional people that will NMR and CD once they see things not go their way. It is rife with corruption in that form (NMR and CD), and in anon live games, it is also rife with cheating, as no communication and straight attacking makes it harder to check for meta and multi (or so they think).
I'd not be upset if it wasn't on the site tomorrow.
Having said that, I do understand people enjoy it, so I'd never take it from them. I do, however, wished it was ranked and awarded points different than full press games, because it isn't the same game and shouldn't be ranked with those that take their time and play the game normally...