I was referred to this website by an intern I worked with a few years ago. One of the sites we were working on was loading excruciatingly slow. When you live on a small Caribbean island it is hard to say whether the site or the hosting company is the issue, or the speed of the internet connection. That is when tools like Pingdom come in handy, since you can even test for several locations. You can test the loading speed in New York City, or Amsterdam for that matter.
You can use the speed test at no cost, if you would like to receive reports and alerts, there are several options and price levels.
Start testing at http://yvettesuggests.com/pingdom