AbigailII: And any rating system worth its salt should not consider a match won 6-4 to be equivalent to a match won 10-0.
In theory I agree. But in practice, I'm not so sure: when on a 10 game match, if I win the first 6 games in a row my opponents may choose to forfeit the rest of the games in the match by resigning early. If their BKR will be adversly affected by doing so, then they will prefer to take all the games through the end, trying to get to that 6-4. The outcome of the match will be the same (I win) but I'll just have to wait a lot longer to get to it.
And if Fencer ever gets to implement a ResignMatch option, that doesn't make you go through every single game left, how would this score be counted then?