The large milk supply and a baby with lots of wet diapers that
nurses often does bring to mind issues I heard about in the
session "Helping Mothers With Too Much Milk" at Maternal
Connections in Mountain View, CA.

The presentation was given by Beverly Morgan, IBCLC.  She  gave
 the following information:

I am happy you picked up on "she feeds the baby long and
often" and the the wet diapers.

It was interesting that even pumping after nursing the fat
content was not as high, but being able to get 2 and 1/2
ounces after a feeding does seem as if the baby has to cope
with an overlarge amount of milk.

I realize these may have already  been explored, but here goes:
It would be helpful to rule out "oversupply syndrome" as DR
Michael Woolridge introduced in the Lancet, August 13, 1988
article, Infant Feeding: Colic, "overfeeding", and symptoms of
lactose malabsorption in the Breast-fed Baby: a possible artifact
of Feed Management?

IN part the Summary reads:
"...The result will be symptoms of hunger (crying fretfulness) and
maybe even failure to thrive. [when a mother has an
overabundant milk supply]

A basic question is does the baby finish with the first breast first,
allowing the baby to have a mix of low fat/ and higher fat milk?

 Another way to increase fat content (while pumping etc.) is to do
a deep breast massage. (I don't have the study in from of me
now...but has this been looked at?
==========================================
Beverly Morgan
Beverly Morgan IBCLC, CLE