Sure, but that doesn't explain why they show the USA jumping from 27.7% to 38.7% in one day (5/24 to 5/25) when Google's numbers don't show a similar rise.
You see the same jump at the same time in some other countries, such as Norway and Canada. I would guess that's down to a measurement adjustment on the part of Akamai, enabling them to see more adoption that they had been missing.