A December 2006 survey has found that 28% of internet users have tagged or categorized content online such as photos, news stories or blog posts. On a typical day online, 7% of internet users say they tag or categorize online content.
Fonte: Pew Internet: Tagging
Realce do bloguer.
A propósito: Sabem que existe uma coisa chamada tags.sapo.pt onde podem ‘indexar/etiquetar’ em Português?