Maybe, maybe not.

In my case, if my body gets too used to excess carbs, I'll feel crummy
at first when I get back on the wagon.  But less so if I've been very
low carb for a long time as opposed to see sawing regularly at short
intervals.

Susan

Exactly how did you select your goal weight?  It is extremely easy to
pick a weight that is below what your body chemistry targets as its
perferred/ideal weight.  Do that and you're setting yourself up for
endless hunger to keep it off.  Set your goal weight at or above that
and maintenance can end up hunger free.  Anyways, the reason I asked is
simple sources like life insurance tables tend to list a number that's
10 pounds too low.  Men tend to overstate their height and women tend to
understate their weight and that puts a 10 pound bias in those tables.

Much of the early loss is water.  The body stores carbs by disolving
glycogen in water.  When the stored carbs are burned for fuel and not
replaced by dietary carbs the water it was dissolved in also goes away.
The later fat only loss is on a slower time scale.

This combination of facts is both good and bad.  It's good because the
early rapid loss is welcomed by beginners. It's bad because if you
don't know what's happening you might expect later loss to be at that
rate as well. The stored glycogen and the water it is stored in are
both very limited compared to the slower and larger store of fat.

There's no good way to estimate how much of those initial 9 pounds are
fat.  Folks with 100+ to lose can drop 2+ per week of actual fat
without hunger.  Folks with 20- to lose can drop 1+ per month of actual
fat without hunger.  The loss rate in weeks 5-6 give a good estimate but
not sticking to low carb means you're currently cycling in week 0
without weeks 5-6 to give you data.

It can take anywhere from 0-14 days for the clean up to finish.  The odd
thing is the time it takes can be different each time there's a restart
so what happened the first time you started low carbing does not
automatically apply the second time.  It's something I've seen reported
by a lot of folks over the years.

The Atkins Induction program does state that one bite does hurt (in the
1972, 1993 and 1999 editions at least.  I don't recall if the 2002
edition also contained that statement).  It's true that a strict start
works well.

On the other hand body builders sometimes do a cycle of weekdays low
carb and weekends low fat.  Some do two weeks of low carb then 1-2 days
of low fat.  It's also extremely effective because of how the hormones
work.  For folks who get low energy from the switch to ketones doing a
cycle like that seems to me like a huge amount of extra work with little
short term gain.

Uhmm, "no carb"?  Just checking that you don't mean this in any literal
sense.  Low carb does not equal no carb.  There's a huge difference
between the mostly veggie based diet specified by every low carb book
out there and the no carb all fish and seal meat diet of the few Inuits
who still live the traditional hunting lifestyle out on the ice.  I hope
you mean none of the high carb foods like white potatoes or grains and
you have replaced those foods with low carb options like salads and
cauliflower.