You're going to get so many varied answers to this...

My DD has only a couple of times slept about 6hrs at a stretch, no more than that.

My niece didn't sleep thru til about 6-7months.

My friends' three babies have all slept thru (12hrs) from a young age - 4wks, 2wks and 8wks. And she had the gall to complain about the one that took until 8wks!!

My sister and I are quite similar in parenting techniques - no strict routine. But my DD is a better day sleeper than my niece. Neither of us cosleep.

My friend doesn't have routines either, and nor does she cosleep.

Not sure what CIA is...