Thanks for the information about the ICZN not having accepted the
subspecies yet. I made a mistake by putting species instead of
"subspecies" when I posted that email. Oops! 
I was aware of the three (unaccepted) subspecies of longipes and
of serratus that you listed.
You asked..."How well did they survive?" All 5 batches of eggs
(25 in all) hatched and at the end of two months all were still
alive and doing well. I would assume that none of these came from
retained sperm, since all the adults were in captivity for over
two years before they reproduced. I have raised a few other
laemanctus hatchlings into adulthood in the last few years.
I have more clutches of eggs in the incubator now.
I have two different looking "kinds" of laemanctus (don't know
how to put it now that you are saying that the subspecies
aren't accepted) and I had a third "kind" (different looking than
the other two) once too.
You said..."I suspect that those in favor of the many subspecies
are basing their results on morphological data, but hopefully,
phylogenetic advances will show whether they are, in fact, full
subspecies, or just locales or "morphs"...what will it take to
prove that they are full subspecies? Do you know what the
differences are reported to be so far?
There are definite differences in the two "kinds" that I have.
The babies of one "kind" have the dark stripe (lighter/darker
bands)down the spine while the babies of the other have that
same stripe but also have a solid dark stripe along the
sides...and the parents/adults keep this solid side stripe
but it pales as they mature. The spinal stripe remains dark.
There are very different arrangements and sizes of scales on
the tops of the heads of both "kinds"...and there are more
differences too.