Median age and accretion properties normalized to squared mass for six young regions targeted with X-shooter: ρ Ophiuchi (Manara et al. 2015; gray empty triangle), Lupus (Alcalá et al. 2014, 2017; magenta diamond), Chamaeleon I (Manara et al. 2017a; cyan square), σ Orionis (Rigliaco et al. 2012; yellow triangle), TWA (this study; black dot), and η Chamaeleontis (Rugel et al. 2018; green empty square). The horizontal error bars mark the measured age spread among cluster members in the case of ρ Oph, Lupus, and Cha I, and the uncertainty on the nominal age for σ Ori (Bell et al. 2013) and the associations TWA and η Cha (Bell et al. 2015). The vertical errors mark the logarithmic dispersion in measured across the various populations. For a clearer depiction, the datapoints representing Lupus and Cha I were shifted by −0.015 and 0.015, respectively, from the nominal median age (3 Myr).