I'm an offensive priest, I can normally grab the flag get it to the tunnel and dump it to some plate and guide him back.
I would say with my guild I have a 90-95% win ratio. When I'm with a pug I'll get like 40%. I also have loaded my friends list with good CTF players so when I go, I know who's good and who's not.
Has anyone else found themselves just /afk'ing out of groups before they start because the groups so shitty?