artefaqs - 5:48 pm on May 21, 2011 (gmt 0)
Safari has a built-in page load debugger. It shows the total page load time, times for various types of files, and times for each individual file.
Develop > Show Web Inspector. Then click the "Resources" tab and choose "Time."
Using Safari is nice because you can just take your laptop to different networks and try them out (cafe wifi, library connection, work, home, cellular, wimax, different carriers, etc...).
As a point of interest, this page took 2.01 second to load for me.