To remove users from the bot, use the .-user command in the partyline.
If the bot is taking 15 seconds to OP people, then you are either using auto-op, which IMHO you shouldn't, as it is a security risk, or your bot is lagged.
auto oping users IS a big security risk but eggdrop users are still going to use that option until its fully removed from the source.
to answer your question inferno you can change the delay of the autooping by changing/adding the setting:
channel add #yourchannel {
aop-delay 0
}
that will op your users just as soon as the bot recognises them when they enter the channel. now the bot may not recognise them right off so in either case the user is going to have to have contact with the bot anyway and might as well use:
/msg bot op password
as it is safer (just in case a someone is spoofing a users host to specifically get access to the bot)
Personally I wouldn't like to see it removed from the source, because there are situations where it has valid uses, and removing it would just mean I'd have to script or code it back into my bots. What I would like to see though is it being only enabled through a define in eggdrop.h, with a big warning text above the #undef about how it can be a security risk.