It appears the tutorial visitor count has been reset and/or bugged. This appears to be a global issue on all tutorials- for example, a tutorial by Ashley with 200,000 page views reads as only having 1,500 visitors (whist having a mere three pages), when the figure only a few months ago was significantly higher. For that to be correct, each visitor would have to view a total of 133 pages, or each page about 44 times. This issue is the same on all other tutorials I have checked, and INCLUDES translation visitors.
I do not know if it is a math error, a database error, or a reset of the corresponding table of values (unlikely since the page views and other statistics were not changed).