Google Analytics Site Speed Differences

Hey. Wondering if anyone else has seen massive discrepancies between Google Analytics Site Speed (in GA, under behaviour > site speed). As a heads up, completely aware that different services have different measurements.

On our site, we’re seeing avg. page loads of over 12 seconds, which is crazy. It’s also really turbulent, when you break it down hourly, we sometimes have loads of over 100 seconds. But not matter what we do with testing through webpagetest, we’re unable to get anything close to these speeds. On average through webpagetest we’re getting times of around 4 seconds.

We’ve ruled out things like mobile connections, devices, locations, and really scratching our heads here.

Has anyone experienced anything similar? Did you manage to find the cause?

Dont’ trust G.A. for any speed analytics. They summarize their numbers, and there are way too many discrepancies in performance that this post could go on a TED talk.

Webpagetest is one of the best places to get lab results, trust the numbers here.