The work is dedicated to the review of some questions of paper and electronic (web-content) texts readability evaluation, subjective perceptual quality of paper text and leading influence analysis. It's found that paper solid text reading speed dependence from the leading has an extremum in range (1.6-2.2). It's not found any statistically significant influence of the leading on the electronic text reading speed. Dependence of texts subjective perceptual quality from the leading has a maximum in range (1.35-1.85).