Just an interesting research study that's been done on different parenting philosophies and the effect it has on a baby's sleep.
Even though I consider myself an attachment parent, I found that I don't fit into the "natural mothering network" as this researcher defined it, but more into the "moderate" group. When Arianna was a newborn, we didn't carry her for 15 hours a day, but maybe 4-6 hours. I didn't breastfeed on demand, mostly because Arianna was happy being breastfed every 2-3 hours, although I did nurse more when she went through the usual growth spurts at 3 weeks, 3 months, etc. We didn't know about cosleeping at the time, so for the first 10 months of her life, Arianna slept in a crib. Her nighttime teething pain was so bad that she started waking up a lot and we all decided cosleeping would provide the most rest for all of us.
I still consider myself an attachment parent because I define it as someone who quickly responds to their child's cues in a caring way. Arianna didn't cry much at all, but I didn't feel pressured to keep her on a strict schedule OR keep her on me constantly. We just adapted ourselves to each other's needs as they became known. I'm glad to hear that this helps promote healthy sleep patterns and manageable routines. It has for us, although Arianna wasn't colicky. The researcher was careful to note that some babies have physical ailments that create unique situations. I think every child/parent relationship is special and unique and when you just listen to each other (and not a philosophy or your friends, etc.), you can usually find that "sweet spot" of harmony.