I understand that page load time is a factor in search rankings, but what location does google base this on? Does it base the page load time on the visitor's location? The reason I am asking is I am trying to work out whether I would benefit from using an Content Delivery Network.
I am based in London UK and am only interested in attracting customers from the same location. My web host is also based in London. For example my page load time might be 2 seconds in the UK, 4 seconds in the US and 6 seconds in Australia. I understand that if I used a Content Delivery Network it would be the same load time in all locations. However I am not bothered about a slow load time in these other locations as I am not interested in selling to people outside of my location. Unless it effected my ranking in the UK.
So does google base it's search results and load time on the visitors location or an overall average? If it is based on visitors location I see no benefit from using a CDN.
Any advice appreciated.