“The ratings come from a formula that includes a) average of ratings from different sources and b) numbers of magazines that rated the album.
The magazines I used for the ratings were:
USA: All Music Guide; AV Club; BeatsPerMinut; Cokemachineglow; Consequence Of Sound; Pitchforkmedia; Popmatters; Rolling Stone; Slant; Spin; Tinymixtapes
UK: Drowned In Sound, The Guardian, Music OMH, NME, No Ripcord
EUR: Gaffa; Humo; Jenesaispop; Mondosonoro; Nojesguiden; Plattentests; Playgroundmag; Sentire Ascoltare; Stroria Della Musica
The final numbers is the average rating and number of reviews in brackets (over 25)