I have never heard the term "Turkey Swirl" in reference to particular marble either. I think the confusion comes because the term "Turkey" or "Turkey Head" is commonly associated with a certain "Turkey" pattern on CAC marbles, as your reference says, but there is no marble referred to as a "Turkey Swirl". Regardless, your marble is not a CAC, it's an Alley, and Alley can display their own pattern often referred to as a "bird head", although the pattern in your first photo does sort of resemble the "Turkey Head" often seen on CACs. I think the author of your reference is referring to the "turkey swirl" pattern in the last sentence and not to a particular type of marble. CAC swirls are random and those with identical color combinations can vary - some might show the "turkey head" pattern while others do not, and a CAC swirl with a turkey head pattern is not usually referred to as a "Turkey Swirl". I hope this helps clarify the terminology.