my DD crawled at 5 1/2 months and didnt sit until around 7 months! :-) i dont think it matter which way they do it, if you just sit your baby up with cushions and pillows whenever you feel like it or remember than i am sure she will get the hang of it sooner or later. i found the conflicting advice really made me dount myself alot, so i stopped listeing to the so called experts and just did what i thought my DD enjoyed/needed.