An anonymous reader writes with a report from The Stack that New York attorney general Eric Schneiderman has begun a probe into the state's three dominant ISPs to assess whether they are actually delivering the service they advertise at the levels promised. From the article: According to leaked documents, sent to Verizon Communications, Cablevision Systems and Time Warner Cable, the New York attorney general asked each firm to hand over copies of the advertising and copy they have provided to consumers regarding internet speeds, along with any testing documents which studied the speed of their service. ... The probe plans to focus on the exchange of data through contractual partnerships between the ISPs and other networks. The AG office suspects that customers who are paying a premium fee for higher internet speeds could be experiencing a disruption to their service due to technical issues brought about by business disputes in these interconnection deals.