Those stats are mostly false, and designed to make you feel better about your ISP.
The ISPs know the URLs of all the speed test sites, so they boost your speed when you visit one of those. They also reduce speeds to things like Netflix, YouTube, etc. It's called "bandwidth throttling" and all ISPs do it.
If you really want to see how your ISP is performing, go here. They host a bunch of different tests that will check if your ISP is shaping traffic or throttling bandwidth to specific sites.
The ISPs know the URLs of all the speed test sites, so they boost your speed when you visit one of those. They also reduce speeds to things like Netflix, YouTube, etc. It's called "bandwidth throttling" and all ISPs do it.
If you really want to see how your ISP is performing, go here. They host a bunch of different tests that will check if your ISP is shaping traffic or throttling bandwidth to specific sites.