The headline is most likely a misunderstanding, but “Output X Watt in Y time” isn’t all that wrong, since it would be talking about how quickly the power supply can respond to demand.

Every power supply has a ramp-up time, and the way the headline is worded hints to a very short ramp-up time, which would be very helpful for network stabilization.

But yeah, it’s likely the headline writer just misunderstood something.