I think what has been forgotten on this thread is that night feeding is an important part of the supply/demand mechanics of BF.
A 3 month old FF baby might well sleep through the night if they are full enough.
A BF baby might well sleep through teh night also.
But because BF babies need to feed in order for you to continue to produce milk, feeding at night ensures your supply keeps up with demand (higher prolactin levels etc).
I kind of assume that this is the reason why some BF babies do sleep through and some not, because each individual baby / mother / breast / supply combo is different.
I therefore also think this somehwat dictates needing to go with your baby rather than prematurely curtail night feeding.
I do know people in RL who exclusively BF and did have sucess with the GF type methods and of course there are plenty on MN too.
However from my own personal experience (a) None of anything mentioned on this thread worked with DS (and believe me, I tried) (b) if I had pursued any strict routine for very long with DS I think my milk supply would have evaporated
and understanding more about BF now than I did then, in hindsight I would not do anything to interfere with allowing the baby to regulate demand / supply for the first 3-4 months at least.
Hence my Holy Grail comments.