As a parent of a 2.2 yr old non sleeper this thread is hard to read without getting cross. The implication that the parents of good sleepers have put more effort in / got into a good routine is laughable .....
My Dc falls firmly into group 3! I have always had the same routine, dark, no interaction, breast fed etc etc....if only it were that simple.
What twothreefoursix said rings most true about different problems at different ages. I think in hindsight Dc must have had silent reflux or cows milk intolerance as she used to wake up screaming up to every 45 mins and passing noisy wind. Sometimes she was soothed by breast milk. This made it impossible to do any sort of CC as I was never sure whether she was in pain. Suddenly at 18m she slept flat on her tummy and didn't move for hours wherease she used to thrash around with bottom in air curling her knees up under her.
I tried all gentle methods of sleep control but they rely on you being able to soothe- shush pat etc doesn't work on a screaming hysterical baby.
All teeth are through at 2 yrs- that was one step forward with sleep then back to weeks of disturbed nights......and the colds and illnesses.
And yes also extremely active in cot, getting stuck at each development stage and immediately pulling to stand and scream before even properly asleep.
And severe separation anxiety
And yes at times I have resorted to co sleeping because I was too physically exhausted to go through to the nursery and sitting for hours in nursery chair waiting for sleep only for the screaming to start when I put DC down or tried to leave was hurting my back.
I think she is highly intelligent and now has an over active imagination and nightmares too.....
The smugness and lack of empathy of some posters is unbelievable.