my last two births were under 2 hours each. Funnily enough with DD2s birth i felt that birth high and empowerment despite the fast birth as somehow i was in the zone and really ready. but then with DD3s birth, like you described i didnt get that gorgeous high and feeling of pure joy and empowerment (despite her birth being 20 minutes longer). I just felt tired and a bit shocked and well, underwhelmed by it all. i had other visions of how it would go (despite it being a beautiful birth, i wanted it to be in the day with my friends and both my girls surrounding me...it was at midnight with just the midwives, DH and my eldest DD.