To follow up my last post, a Medline search for "frenotomy" yielded 2
abstracts, including Chele Marmet's article copied below.  Although JHL
may not have every MD's respect (yet), its inclusion on Medline ought to
mean something since that is a common resource for doctors.

                       Record from database: MEDLINE

Title
     Neonatal frenotomy may be necessary to correct breastfeeding
problems.
Author
     Marmet C; Shell E; Marmet R
Source
     J Hum Lact, 6: 3, 1990 Sep, 117-21
Abstract
     A review of cases of short frenulum (tongue-tie) seen in a recent
year at the Lactation Institute and Breastfeeding Clinic provides data
about its relationship to sucking and breastfeeding problems such as
insufficient infant weight gain and reduced milk supply, sore nipples
and repeat bouts of mastitis in the mother. Frenotomy was recommended
for ten of 13 babies who appeared to have a short frenulum. Three
mothers chose not to have the frenulum clipped and either gave up
breastfeeding or continued to experience problems.  Breastfeeding was
successfully established by the five healthy babies whose frenulum was
clipped. The two babies for whom frenotomy did not completely correct
breastfeeding problems had severe birth defects.

~~ Nancy Penney