[necovek]

That's why it's confusing: "2x speedup" would clearly indicate 200% of the current speed, so 97% speedup is unclear if it's a multiple (not because that would be a slow down), a reduction in time (which was my assumption) or an increase in speed (something per unit of time).

I guess you are right and it's probably the latter, but obviously better language would have avoided any doubt.

[elcomet]

I understand it as " the speed increases by 97%"

[formalsystem]

yeah indeed choice of language might not be ideal, it seems like 2x language is clearest to folks? I can make some quick edits to the article