[erydo]

They did say "1.6x faster", not using the term "speedup" (which is terrible nomenclature too, but that's not the point).

To say that something that's no faster is identical to something that's "1x faster" is a terrible confusion of thought.

It's reasonable to expect that, for example, "1x faster" would mean "for a baseline of 1 operation per second, it's faster by 1 operation per second, i.e. a total of 2 operations per second."

EDIT: Oh god, that's even before I saw the "1.2x slower" entries…