A lot of those "up to"s are expressing user options, though -- "up to" 512 GB RAM means that there are configurations that include that, but also cheaper configurations that don't. That's a pretty different beast than "up to 4.3x faster performance", which means (presumably) that exactly one benchmark showed a 4.3x improvement and the rest showed less -- which is to say, means very little.

up to 46 times, you mean?

I enjoyed "up to an 80-core GPU, and a staggering 512GB of unified memory"

Staggering?? I can count on no hands the number of times that a fact or figure has caused me to stagger.

Whats an up to dog?

That's probably up to 300% of an increase from 'previous' press releases