It’s not a “shitty title”, because Ubuntu Linux is the thing they actually tested.
Whether Debian or Fedora or Alpine or Void or whatever would do better or worse is not a given, and isn’t something the OP can comment on because they didn’t test it.
We can probably infer that gains of a similar amount would be seen on most mainstream distros (as they’re all pretty similar under the covers), but that’s not on the OP.
In particular, Ubuntu ships with various non-free drivers and kernel patches that will be present in some, but not all other distros.