It's probably a lot different on PvP servers since RP in general doesn't seem to attract a lot of kids
One problem we have though is while it doesn't seem like the population imbalance is as bad on my server as it is on some it does seem like a lot more Imps PvP than Pubs. I would guess the majority of people Empire side PvP while I would be surprised if even half of the Republic PvPs.
While I would agree Ilum isn't the best PvP ever it can be pretty fun when the pubs actually show up in force. The mentalities are just totally different though. With the empire they usually take us by surprise, we form up, rush them, die, form up, rush them again, and again and again and again. But with the Republic it seems that they are so used to be being zerged down that even with a fight between equal numbers they will tuck tail and give up as soon they get wiped.
Edit: lol where did all the posts go? I guess all that 1337 trolling caught up to Milkies.