a lot of servers will have stats, some are even centralised so large groups of servers running the same stat mod will share the info... however the information is ropey at best, often the top of the servers will just be who has spent the most time on them, not who is actually the best and collating information between servers is difficult since player count / gametype / just the particular community of that server will have a dramatic impact on the amount of points you can expect to achive there... basically, outside of being in a team that competes in leagues / tournaments / ladders, you won't really know how well you are (or aren't) doing.