The claim
Readers scan rather than read, so front-loaded answers, informative headings and scannable structure materially affect comprehension and engagement.
What the evidence shows
NN/g's eye-tracking studies document the F-pattern and layer-cake scanning behaviour, where users fixate on the first words of lines, headings and the top of content. This supports front-loading key information, writing descriptive subheadings and using structure that serves scanning - the same structure that also aids machine extraction.