Not sure if this was a one-time thing, or the start of something very wonderful, but time will tell. He has been sleeping longer after his last feed before bed (6-6.5 hours), but the jump to 8 hours was quite surprising.
Not only that, he then went back to sleep until about 10am! We were actually to the point of feeling like we slept too much!
DH starts work tomorrow, so we'll see how this whole thing goes when he has to be up at 7am to get ready.