The speed of Cephalotus growth depends upon a number of factors, including its age, the particular clone, and the growing conditions.
I have a number of different Cephalotus clones and their habits definitely vary; their flowering may be months apart, so too their periods of vegetative and pitcher leaf production. Some particular clones have a reputation for slow growth ("German Giant" for example) while others are quite vigorous and produce mounds of pitchers in lieu of the tiny rosettes others exhibit in the same span of time. Also, whether the Cephalotus was tissue-culture in origin seems to play a role in a slower growth rate. Some TC plant species are tremendously vigorous out of the flask, not so this one for some reason. Those TC Cephalotus clones still remain the slowest in my possession, easily outstripped by all of my vegetatively-produced plants of similar age. On the average, most of my plants produce new leaves every three weeks.
Warmer temperatures seems to increase growth rate -- to a degree, but I have found Cephalotus to be fairly touchy about sustained high Tb (mine now seldom reach 27˚ C / 80˚F). A plant die-back from last Fall that I partially attributed to overheating, only has returned with cooler Tbs this Summer.
Let your plant acclimate to its new surroundings and cultivation. As Cephalotus ages, the growth rate is likely to increase . . .