I believe not, but there is only one way to find out I'll take a look at the source though, as far as I can remember eggdrop triggers the binds first and only then updates its internal structures
well it turns out to be somewhat tricky but it still works the way I thought it works
the thing is that both server.mod and irc.mod add H_raw built-ins for handling NICK messages, but check_tcl_nick() is called by the irc.mod handler only; however, server.mod's built-in is added before irc.mod's since irc.mod requires server.mod to be loaded first; that means server.mod's handler is called after irc.mod's handler because of the the singly-linked list mechanism of bind lists; which actually means that botnick update (done by server.mod's handler) happens after triggering Tcl [bind nick] proc