I would say don't pay any attention to the statistics. Too subjective.
I would be curious to what SR's statistics are
I know since joining in July, I have seen people come and go (much like they do in AA perhaps), it's disturbing in the extreme when regular posters just disappear. It's only happened a couple of times in my brief experience. But by and large I think SR does a pretty good job. One thing to consider, there is no court ordering people to join SR...everyone who comes here does so because on some level they want to get sober.