I haven't read this thread in detail and I know you either love GF or hate her, but today I just wanted to add my thoughts:
I bought all GF books when pregnant - read them and discarded them (thought it all souned a bit mad) ....
Then when dd was about 2 weeks old and I was at the end of my tether - didn't have a clue about babies, didn't know what I was doing and what the baby needed - I just thought - I'll have a go with GF (against midwife's advice) and then at least I will feel like I'm doing something constructive rather than sitting here like a jibbering wreck. Within 2 weeks I was sorted and couldn't thank GF enough. Baby sleeping well, eating well and generally happy, husband and me had evenings together and more importantly, I was happy (however I was a stickler for organisation and routine before baby so that was why I was probabaly happy).
I did follow GF strictly, but what I found as she got older was you could be more flexible - change nap lengths and times to suit your day, etc. I also really liked baby Whisperer Tracey Hogg and in the end I think I was just taking elements of both gurus that suited me and my lifestyle.
DD is now 18 months - still has a routine, sleeps from 7 until 7.30, eats well and smiles most of the time.
I think if you have no experience of babies (like me) then GF or any similar books can be a god send when you're learning the ropes and have zero confidence in your parenting abilities - sad I know, but I felt I could handle anything to do with DD as long as I had GF in my hand!
Hope this helps