My DD slept through the night from a very young age (less than six months). So there was certainly no correlation between feeding to sleep and sleeping through. She went through a dreadful stage at about 16 mths with a lot of night waking, I bf her for a little while and then night weaned (clearly she'd done it without bfing for a long time).

Leasha - DD still comes into bed with us every night, any time after midnight, sometimes as late as 5am. But she's always there, snuggling into me, when I wake. It's a bit easier when they can do it themselves without waking you.