Peter's apparent age was inconsistent even before Brand New Day
. Straczynski wrote him as a mature adult in his late 20s, a husband, a teacher, a former grad student, a man with a lot of experience and history. But at the same time, Paul Jenkins' characterization of Peter/Spidey made him seem more juvenile in the way he talked and acted. And these were supposed to be in the same continuity at the same time.