Its good practice to use online website for checking website speed. I would refer using http://www.webpagetest.org
as I feel its a good website to check website speed at different location and with different browsers.
Secondly, you can add _gaq.push(['_trackPageLoadTime']);
in you analytics code and in analytics result you will get the page load time. Its also a good way of measuring and optimizing pages.
Third, you can also use google webmaster tool to get the page load time.
There are many ways and choices you have to measure. What I feel after opening it that its little slow but that may also be my ISP problem or so.