AndyA - 2:01 pm on Mar 29, 2010 (gmt 0)
I think there are still issues with this tool. It is in the "Labs" section, which means it's still under development. It tells me I should gzip compress my site to speed it up. My site IS gzip compressed.
It shows the average time downloading a page in the other section is 475, which is high due to a server that was failing and was replaced last month. The minimum time is much lower, and should be more representative of the average.
I did ask a friend who is still on dial-up to check my site, and he said it seems to load faster than it did, and is generally faster than other sites he looks at. Not scientific, but he said the time it takes to download my pages isn't excessive in his opinion.
I think this tool still needs a bit of work.