Definition of slow?

Hi, I've just started riding about a year ago and bought myself a biolite Temet 138 w/ 03 Exos about 1/2 a year ago. I read in the discussions here that the Temet is a "slow" board. Can someone please tell me what exactly is "slow"? Aren't I traveling are the same speed at which the boat is tugging me? What am I suppose to feel compared to say a Parks? I see the chart that the Temet is slow and has no pop compare to the other Hyperlite boards. I know that I'm not getting air because of my technique, not the board, but would a 3 stage really make that much difference?