On the internet, the pluralism of information is supposed to result from the multiplicity of sources. The web is expected to offer a wider range of contents than offline media (as developed in the Long Tail theory). But such an assumption requires to be proved by empirical evidence. Our research aims to test this hypothesis on the basis of a transdisciplinary quantitative study of French speaking websites. Based on several thousands of articles coming from different categories of websites, the editorial identification of topical issues and the lexicometric analysis of the titles both highlight a more complex situation. The wide diversity of issues dealt with, during a day on the web, simultaneously presents a high concentration of a few major issues, often treated in a redundant way. These results show that the ideal of pluralism that the internet is supposed to embody needs to be put into perspective.