I believe the green speeds you see here in this game correlate with what is called stimpmeter IRL, a device used to measure the speed of a green.
![](https://ncg-live-assets.ams3.cdn.digitaloceanspaces.com/uploads/2022/06/GettyImages-173217386-1030x686.jpg)
Google says at the (British) Open, it's usually between 10 and 11, while the US Open & Augusta National for the Masters will have them running around 13 to 14.
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