What it says is this:
> uv is fast because of what it doesn’t do, not because of what language it’s written in. The standards work of PEP 518, 517, 621, and 658 made fast package management possible. Dropping eggs, pip.conf, and permissive parsing made it achievable. Rust makes it a bit faster still.
Yes exactly! That quote directly disproves that all of the improvements UV has over competitors is because of algos, not because of rust.
So the claim is not well supported at all by the article as you stated, in fact the claim is literally disproven by the article.