I was checking a site with Google Page Speed.
When I looked at the score based on the results from the Google extension, I got a 71/100
When I evaluated the same site via the Google Page Speed site, the score was something like 51/100.
That seems like a huge difference.
I checked another site (with less traffic) and it was 71 on Page Speed's site and 81 on the chrome extension.
I'm trying to benchmark a site prior to making some changes and am trying to figure out why there is such a difference.