In times marked by an abundance of news sources and the widespread use of social media for staying informed, acquiring accurate data faces increasing challenges. Today, access to information plays a crucial role in shaping public opinion and is significantly influenced by interactions on social media. Therefore, studying the dissemination of news on these platforms is vital for understanding how ... [Show full abstract] individuals stay informed. In this paper, we study emergent properties of media outlet sharing behavior by users in social media. We quantify this behavior in terms of coordinates in a latent space proposing a metric called Media Sharing Index (MSI). We observe that the MSI shows a bimodal distribution in this latent dimension, reflecting the preference of large groups of users for specific groups of media outlets. This methodology allows the study of the extent to which communities of interacting users are permeable to different sources of information. Additionally, it facilitates the analysis of the relationship between users' media outlet preferences, their political leanings, and the political leanings of the media outlets.