Lyne  burbled across the ether:

My bulk splenda reads sucarlose and maltodextrin.  The label claims zero
carbs per serving, but I know that a teaspoon of the boxed or bagged
stuff comes out to .5gram (because of the information the Splenda
website offers for baking-- namely 24 carbs per cup of bulk splenda,
which works out to half a gram per teaspoon).  The packets use dextrose,
which also works out to 1 gram.  When something is labeled <1g, that
means it has more it is somewhere between .6 and .9 gram. (And US law
allows anything .5 or lower--per serving that is-- to be counted as
zero.  This is what is known as hidden carbs.) Unless you are really
anal, count anything .5 and lower as half, and anything between .6 and
.9 as one gram.

The problem with figuring out when to count carbs where splenda is
concerned is because the manufacurer does not distinguish between pure
sucaralose that it sells to manufacturers to use in thier products
(truely zero carbs) and the sucralose sold on the grocery shelves (the
"consumer use" mentioned on its web page) which does have carbs in it
because of the filler.   Unlike the manufacturer of Nutrasweet for
instance which uses the aforementioned name for processed foods
containing just the sweetener, and Equal, which contains the
sweetener--also measured in micro amounts-- and a filler in packets and
spoonable versions for consumer use.

The filler is added to make it spoonable.  The amount of sucralose in
either the packets or a spoonful of powder  is something on the order of
5 to 10 hundredths per.  You'd have to use a tweezer to get the correct
amount if you used the 'pure' stuff in granular form.

Since the manufacturer only sells the pure stuff to food makers (bummer,
add your voice to the liquid splenda petition
http://www.PetitionOnline.com/Splenda1/petition.html) that means that
you should only count carbs when you add splenda powder or packet to
your food or drink.

Anything that comes with splenda already in it doesn't have any extra
carbs from the splenda (including DaVinci's syrups which is one reason
why many here prefer to use those instead of the powders.  A teaspoon of
the 'syrup' equals a teaspoon of the spoonable stuff, but without the
carbs because the "filler" is water) because food makers use the carb
free version.

<snip>

Lyne,
It's not the Splenda/sucralose that has carbs. It's the fillers they use in
the packets that have the carbs. Sucralose is so sweet that if they put it
pure in packet form for consumer use there would only be a speck in each
packet. That's why they use fillers.

Manufacturers don't use Splenda packets to sweeten their products. They make
products in large enough batches where they can measure the pure
sucralose/Splenda and use it. No fillers, no carbs. At least no carbs from
Splenda.

Geez, can you read?  It's been explained several times now, including
in the excerpt you just quoted.  It's the fillers in the consumer
versions of Splenda that turn it into a powder that contain the small
amount of carbs.  Diet Rite uses the liquid product, which has zero
carbs.