I've heard this claim various times, but it doesn't really make a lot of sense. Butternut squash has a carb:fiber ratio of about 6:1. Canned pumpkin is more like 3.5:1. Sure, the USDA might be lax on the precise definition of the word "pumpkin", but I don't expect them to go so easy on the nutrition data.

As Wikipedia notes:

>The term [pumpkin] is most commonly applied to round, orange-colored squash varieties, though it does not possess a scientific definition and may be used in reference to many different squashes of varied appearance.

If the article is simply intending to say that it does not usually come from squashes that are orange, oblate and ridged, then that's fair. But I don't think it's mostly butternut squash, and I don't see why manufacturers would try to hide using the most popular variety of squash.