your car is still very very new.
but its mostly your driving. That's not criticism. We all started out that way, for the most part. It sounds like you want to change...adopting hybrid habits is a little like a 12-step program
Read through the threads in the HAH forum about acceleration- the evidence generally weighs in on the 'take it easy' side, though it is not 100% settled yet. Its tempting to get up to speed quickly, especially since the HAH is sooo good at that, but an ICE running at full load is a poor excuse for efficiency. Keep the load as constant as you can- that means slow acceleration up and slow deceleration down.
Forget about how fast the car can be, and concentrate on how efficient it can be. You and I know how fast it is already. Like dessert, its ok to splurge now and again, but save it most of the time.