It would absolutely be a phase change in practical utility, but it still wouldn't be "super intelligence".
If something is roughly as intelligent as a normal human expert in a given area, but 100 times faster, that would be a valid example of super intelligence.
I'm sure that by some definitions like this we've already discovered narrow super intelligence.
For example - breadth of knowledge. Is knowledge a kind of intelligence? If so then current agents absolutely have a breadth of knowledge which is superhuman.
Tortious really does win the race, and there is no such thing as a free lunch.
I'm not sure what my (or yours) point is, but like with all of AI it's a moving target - I still remember how image recognition was deep in researchy Artificial Intelligence territory. Nowadays it's such an obvious building block, nobody thinks of image classifiers as "intelligence".
100 years ago there's not a single person who would deny that computational ability is intelligence.
It's only since calculators because really good at it that you'd even think about asking the question.
I'm not really interested in popular media definitions of things.
5 Forms of Superintelligence (2018, review of Bostrom's Superintelligence from 2014)
Featuring .... the SPEED SUPERINTELLIGENCE! It really has been considered that way, even in scifi prior to the current AI epoch.