I just read through this thread again. I must admit, ava's intensity about his opinion of my abilities is a bit disturbing to say the least, I feel a bit violated honestly, but the actual point of this thread is interesting nonetheless, so that's where I'll focus my comments.
Personally, I think the ranking system is just fine. What Ivo appears to be frustrated with is the difference in priorities/opinions people have on this site. No ranking system can prioritize things accurately for every one of the thousands of players on this site, it's impossible. A ranking system has to be relatively generic, and as long as people understand its accuracy at ranking is a mere estimate, then there isn't really a problem.
As far as differences in opinions on how to play, that debate will never end. Personally, I've always enjoyed games with Dunecat and have found him to be an admirable opponent. That said, I prioritize preventing a solo just a whisker behind getting a solo, and after how Dunecat played this game I'm left wondering if I'll ever willingly join a game with him again, since our views on how to play diplomacy are so very much at odds on this single point (regardless of how many other points we have similar views on). It's nothing personal, Dunecat is free to take a one-in-a-million shot (I'm being generous here, by the way!) at a two-way draw over a guaranteed three-way draw any day of the week, but I'm just as free to avoid playing a game with someone that thinks that way if I want. Different strokes for different folks.
As far as how specific people are ranked, and comments made by ava and hellalt, I have a few things to point out. One comment is that people that are considered to be relatively "good" at online diplomacy are not "good" every second of every game, not every bit of press they utter is profound and not every guess they make about what orders to submit in a given season is spot on perfect. That is absurd. Hell, the New England Patriots lost to the Cleveland Browns this year, right? Everyone has those moments, some more than others, but I think what makes a player a quality player is an ability to excel in spite of personal shortcomings. Speaking on my own behalf, for the first 2+ years on this site, I never EVER thought of myself as all that good of a player. I tend to hyperfocus on my shortcomings and downplay my talents. But, in spite of being more interested in how I play the game rather than if I win or lose, at some point results speak for themselves, especially over an extended period of time, and since October 2009 I have won 8 games, drawn 29, survived zero and was defeated 4 times, which means I have won or drawn over 90% of my games the last 16+ months on this site, so regardless of what I personally think of my abilities I must admit that I am above average based on my results.
I must run, but one last comment, for me specifically, is that I tend to be very reactionary. If I view someone to be an ass (regardless of if they are being one or not), I find it difficult to avoid being an ass in return. My interactions with people vary greatly and it's not only based on how they interact with me, it's based on the game board and how all six players are interacting with me. I'm sure in any one or two games I can easily come off as quite the ass, as appears to be the case with ava, but I like to think of that as the exception rather than the rule. So, regardless of any one's opinion of the quality of play of any one other player, it is all subjective and a bit of a useless conversation (as someone else pointed out earlier).
Must run, will discuss more if others are interested...