I read "slow" and "fast" in the article as comparative term. "slower than" what the writer has seen in other cases.
Absolute ms doesn't prove much unless you put it in comparison with other best.
Absolute ms doesn't prove much unless you put it in comparison with other best.
Theoretically better (which is questionable at best in this case) doesn't mean anything useful if it doesn't actually matter in practice, or is always worse in pracftice.