"   I see lots of babies who appear normal in every
way who fit into this category in early feeds.  I think it may have to
do with the low milk volume at this time. "

I think it also often has to do with positioning -- either baby "knows" she's not on right yet, and keeps trying to readjust the latch; or mom is holding her in such a way that may interfere with sustained suckling.  For instance, a heavy breast resting on a small chin makes the baby stop a lot to rest; a baby not held close enough to the body often takes long pauses (during which he grips with his gums) just to hold on ...  I have been involved in many situations where position alone was the culprit, and with a simple alteration, baby latched on in a proper and sustained suckling pattern.
Of course, most of the time I might just have been in the right place at the right time -- baby was now ready to wake up and eat.  But many times it did come after several days of frustrating experiences for mom and baby, where nobody noticed that only a very slight change was necessary.

Chanita, San Francisco
BSc,RN,IBCLC