We have a Wordpress instance running on Ubuntu 12.04 LTS and Apache 2.2.22, and it takes > 3 minutes to load a page in Chrome and Firefox, whereas it loads instantly in Safari.
I have no idea what the issue could be. I tried setting
in Apache, in case DNS lookups of client IPs slowed everything down, but that didn't help.
Admins recently upgraded the Wordpress instance, but I have no idea if the issue is related to that.