Apparently BFing mothers are in tune with their babies.
I only co-slept a few times, and formula feed, but I assure you I was quite "in tune" with my baby, and fully aware of where she was at any given time. I can see that probably more BF mums tend to co-sleep for the convenience of night feeds, but I really resent that implication that somehow formula feeding means that I'm not "in tune" with my baby.
I appreciate you probably didn't intend any offense, but perhaps you should either cite your source of this information (with a link), or reconsider how you word things?
OP - I think at the top of the NP section there is a stickied post which has a link to more information on co-sleeping in it.