Kuzan singlehandedly ended the DF fruit merchant agenda, established that fruitless Admirals are above YC1 and literally brawler with Garp the Fist next to his main being fruit usage. Yea fuck it was an amazing performance.
Two blitzes at best establish that Old Garp is faster, who cares, it's one stat. There is no evidence that any Yonkou are as fast as Old Garp.
Plus there are several excuses Oda gives in the same panel you posted.