There's no good definition of superintelligence. A calculator is already way more capable than any human at doing simple mathematical operations, and even small AIs for local use can instantly recall all sorts of impressive knowledge about virtually any field of study, which would be unfeasible for any human; but neither of those is what people mean when they wonder whether future AIs will have superintelligence.

General superintelligence is more well defined, I assume that is what he meant. When I hear superintelligence I assume they just mean general superintelligence as in its better than humans at every single mental task that exists.