is this sentence using ほど　grammatically correct?


I was watching this youtube vidoe about making a dish out of an greater
amberjack fish (kampachi) and the cook said this:

> 鰤ほどは痛むスピードが遅いですけど

i think he wants to say that the greater amberjack fish spoils slower than the
鰤 fish but if that was the case should not he have said 早くない instead ?
<https://youtu.be/r8peOCisk94?t=420>




I'm 99.9% sure he meant to say `鰤ほどは痛むスピードが速くないですけど`. `鰤ほどは痛むスピードが遅いですけど` is
not grammatical (so I'm 100% he misspoke).




I'm 99.9% sure he meant to say `鰤ほどは痛むスピードが速くないですけど`. `鰤ほどは痛むスピードが遅いですけど` is
not grammatical (so I'm 100% he misspoke).

