Oh Crikey.
3.6yo DS has a sleep disorder. He's woken up every couple of hours every night of his life.
HVs, GPs etc have always advised the usual tactics, nothing worked.
We saw a specialist pediatrician today who told me kindly but firmly that CC, rapid return were always doomed to fail and I need to reset his sleep. By keeping him up until he's totally knackered.
"take him swimming, to the park, to late night soft play" he merrily advised. 
Bloody hell. I've got a 5mo as well. How the actual fuck is this going to work?
Has anyone ever tried this strategy?
I am rather dismayed at losing my evenings but I s'pose if it works and we can move bedtime back gradually to a sensible time after six months then hurrah, right?