Nielsen ratings for the first four seasons are not entirely accurate, however, as Nielsen reported aggregate numbers for cable networks prior to January 2004, meaning that people who were included in the ratings estimates were actually watching HBO channels other than the main one on which The Sopranos aired.
Nielsen ratings for seriens første fire sæsoner er dog ikke helt præcise, da Nielsen før januar 2004 rapporterede samlede tal for kabelnetværk, hvilket betød at folk som så andre HBO-kanaler end den centrale, hvorpå The Sopranos blev vist, ville blive inkluderet i vurderingen af seertal.