Wow! That's very surprising. It's been a while since I lived without fibre; maybe DOCSIS got a lot smarter in the last few years?

I would add the standard caution when looking at averages, that symmetric 1/1 fiber may be pulling the upload value up significantly. Or that Speedtest users have higher internet speeds.

But I really want that stat to be true. The world of American ISPs is sad and depressing.

Also, what type of customers run speed test normally? Those on the more technical side, thus those running the test are likely to have higher level packages from their providers, further skewing the data

Average is useless here, because upload is so very restricted on some connections, but not others.

The first google result for median says it was 60/5 two and a half years ago. If you can sustain 90% saturation that's 164 days. Over half a year at 80%.