That dufus who wrote "Residential Construction Academy: Electrical Principles" released a new edition. A quick scan of the pages available on Amazon turns up a few gems including his assertion of conventional current as a "theory" and that we've "established almost to a certainty" that electron flow is correct. Derp.
So I see where people could get confused about this.
The same guy asserts that the effects of electricity in a wire travel faster than the speed of light. Another derp.