I have a Perl script at home that could be somewhat useful to you. Whipped it up when the ol' nimda virus was running amok so as to satisfy my curiosity concerning the number of hits from hosts outside my home LAN [I use dialup at home, so any hit to my home web server from outside my LAN was guaranteed to be a virus hit...].
It will only tell you how many times a particular IP hit though ("x.x.x.x hit here y times" is what the output looks like currently), which isn't necessarily what you're looking for (I think any users going through a proxy would all show the same IP, for instance, so a large number of hits from a particular IP could be legitimate).
Knowing the IP's of hosts with excessive hits, you could perhaps grep the logs for that IP and see if the timestamps for page requests are reasonable for human users or whether software was automatically downloading everything. There may even be a way to tell from the browser info whether it was a bot downloading - not sure about that.
All that work with your own eyeballs is pointless though; a shell script or perl script could probably give you a good idea of what the big boss is looking for automagically. You could even schedule it as a cron job and email the big boss with the results if you wanted to.
Email me if you want to see the perl script I mentioned.
[Or maybe someone else knows of a quick, easy, download-and-go utility to do the same thing!] Matt
matt@paperlove.org
If I can help, I will.