Husband and I did it about a month ago... Your time to 4300 was our time also (3 hours)......except we started at 8AM, no need to start real early on the day we hiked as the high in PS was only in the very low 80's.
Our total time on trail was 9 hours, 20 minutes but actual hike time was 8 hours, we enjoyed the views, had 2 small lunches, took loads of pictures........... and knew darkness was not until 7:30 and we got to Grubbs Notch at 5:20PM.
Savor your first time.......I still get excited when I tell people, then I see the glazed look and know, they don't really care
Congrats again! Hiker Linda