I can vouch for this as well....in a lot of Western communities, if you are not in a hunt linkshell, best bet is to check the PF first. I know on Siren, there's usually one up for the S ranks and world bosses. If there's no PF up and there are people gathering, either ask for an invite or make a PF yourself - I usually get a decent amount of people joining up if I start a PF