Without any independent actual measurements of the same stack running on the same hardware with those optimizations turned off, we can't draw any conclusions regarding their significance.

Considering Apple has been so adamant about misrepresenting what's really TSMC silicon as "Apple Silicon", I'm viewing everything they say through "PR oozing with insecurity about not actually controlling access to their chip's manufacturing process, and desperate to convince consumers (and investors) of this being a uniquely Apple advantage" glasses.