Hmmm, I don't know about that. DD1 hit about 9mo and slept 30 min blocks, awake for an hour in between. Sometimes worse. I DID hallucinate and I was so sleep deprived, I wanted to throw her out the window. While I don't think her sleep patterns at that time were necessarily *abnormal*, I do think my expectations played a huge role in how much I struggled. It became the main thing in my life, and I was always trying to focus on getting more sleep, longer sleep, better sleep. She's 2.5 and still wakes regularly through the night. When DD2 came along, I was tired, sleep deprived, run down. I had PND and DD2 had awful reflux, but my mindset about sleep was very different, and I really have not struggled in the same way, despite having more reason to this time. At 12mo, DD2 still wakes and feeds multiple times through the night. It is what it is. I agree that there are some babies who probably have a harder time settling than others, and that it is a problem for them. But mostly, I do believe it is mindset. And this is from someone whose babies slept all night long at one point or other in their lives, then back flipped.