Protein is being coverted to glucose on an almost constant basis as your body strives to maintain glucose homeostasis, however this process (called de novo gluconeogenesis) happens in the absence of insulin and in the presence of either cortisol, glucagon or epinephrine.

The process of storing fat into you fat cells needs both fat and insulin. The process of making fat requires both excess carbohydrates and insulin to activate fat synthesis. With glucagon being released instead these processes are inhibited. Thus, the mere conversion of amino acids into glucose by gluconeogenesis should not be misunderstood as a mechanism through which fat can be synthesized or deposited into the fat cells. The glucose produced by gluconeogenesis has a “tag” on it, and it will serve to supply for blood glucose when the levels fall.

And from this website's Tips section:

There are some claims that sugar alcohols don't have carbs, and therefore don't count; that they can be completely subtracted if listed on the label. This statement is not entirely "false" but it is misleading. Sugar alcohols do have carbs, and approx. 1/2 to 3/4 the calories of regular sugar. They are more slowly and incompletely absorbed from the small intestine than sugar, thus producing a much smaller and slower rise in blood sugar ... and consequently insulin. But this is a YMMV thing. Some Type 1 diabetics have reported that they sense an immediate "sugar rush" from eating even a small amount. Others notice no change, and absolutely no effect on ketosis.

To someone who started LCing following Protein Power the use of "effective" carbs on sugar alcohols rubs me the wrong way. ECC was dubbed by the Eades to refer to the fiber content in a food and it has since been bastardized.

-Nat