tedster - 6:08 pm on May 19, 2011 (gmt 0)

Any of the free page speed tools online that generates a "waterfall" graph will show you how much time is used by each step, beginning with the time to first byte from the server, right up to fully loaded and initialized.

But the speed of the server is going to be a minor factor for the page load time, especially on an image heavy site. You will need to pay attention to things like image compression (shoot for a Photoshop 40% on jpg files), proper cache setting, use of a CDN (serving images from a differnt host name to allow browser multi-threading) and steps in that area.