Are Web Visibility and Data Quality Related Concepts?

Websites that provide a high level of data quality should logically be more visible for search engines. However, search engines base their results on methods such as Web hyperlink structure analysis and ignore data quality. The authors evaluate data quality in a group of 88 Web portals in three different domains and compare the results with the sites' positions in a visibility ranking. Looking at the relationship between data-quality level and visibility, their results show that data quality isn't a key factor in visibility.