Zivush - 7:23 am on Jun 24, 2012 (gmt 0)
There is also a free application called boomerang.js that can give some great insight into page speed for each user - instead of some abstract testing service.
Haven't tested boomerang.js yet.
Just some initials - What is the difference between boomerang.js and G Analytics?
G Analyitcs gives: in page analytics, page speed and time on site per landing page?