Huge Jump in GPS

My C29 GPS essentially 3x’d after the hard fork.

I am using GrinGoldMiner 3.0 and my graphics card is an NVIDIA 2080 Ti 11GB.

I was getting about ~5-6 GPS prior now I am getting 16-17 GPS.

Is this expected to sustain or am I missing something? How much was GPS supposed to be going up all around? Certainly not complaining - Thanks!