"Deliberately misleading"? In this case the journalists are literally copying the terms the cosmologists are using.

From the preprint - "The South Pole Wall rivals the Sloan Great Wall in extent, at a distance a factor two closer. The iconic structures that have transformed our understanding of large scale structure have come from the observed distribution of galaxies assembled from redshift surveys: the Perseus−Pisces filament (Giovanelli & Haynes1982), the CfA Great Wall (de Lapparent et al.1986), the Sloan Great Wall (Gott et al. 2005)"