M.G.
I did the eat-play-sleep formula with my first after someone gave me that book. Screwed me and baby up. Worst sleeper of all my kids.
Baby#2 on, we just were busy with child #1, and followed him around and were busy - babies just fell asleep when tired. Fed when hungry. No rigid routine. I never looked at clock. I enjoyed it so much more and babies seemed much easier. Followed their cues.
I used to do one big last night feed before I went to bed - my husband would often bring them to me in bed - so even if they went down at 8 pm, they got replenished at say around 11 pm. Then they'd sleep till early morning - say 5 am or so. It took a while, but that worked well for me at night.
My babies all slept differently. So hard to compare. The times in between will stretch out over time. Mine often slept in bouncy chair - favorite place for them to nap, with noise going on around them.