[nhawk]

Just because you are running recent gen dedicated hardware does not mean that the operating system and associated server level mods are optimized for the job. Dedicated servers are rarely fully configured by the provider to run at their best speeds. They are almost always configured for generic use. This is especially true of MySQL. I have never seen a MySQL installation that didn't need to be re-done properly.

If you're running a server that you installed the operating system on, and are running the stock configuration then you definitely need to go through optimization. Out of the box configuration is not good for any site.

I run an old dual single core server for my site and page generation time is always between 0.09 and 0.10 seconds. Plus an average page load time (data transfer time) of 264ms.

Take KH99's advice and head over to the support forums on vBulletin.com and ask for server optimization there. Once that's done, then you can look to see if there's any coding problems to be taken care of. But I don't think there are any.

EDIT: I just did a check on the global.php load time on my server. It is 17ms or 0.01723 seconds on an old slow server. So, that definitely points to your server configuration needing optimization.