Also if you are on the "Play Online" screen where all the servers are listed, you can click once on the server and click "Get Server Info". It shows you all the settings, players and their respective pings. If any of the pings are 0, bots are there.
Since I don't use Xfire, I do it that way. I never saw the "bots" filter in-game. Guess I wasn't looking.
You can check my SL entry for where I play. I haven't had a lot of luck finding servers that are pub or even jaymod that don't have adren carryover or some crazy crap going on like double-jump or low gravity. I go where I go because my ping goes to 30 after a few minutes. Adren carries over to all classes so I go through ammo like sht through a goose.
Most of the people can't shoot super great, but if it takes 15 shots to kill EVERYONE, it's still a little bit of a challenge. LOL
J
I play late, so there is no one on IoW long enough for my ping to drop from 200+ to 50.