M-LAB Blames Transit Carriers for ISPs Service Performance Degradation

A new report by M-Lab concludes that "we observed sustained performance degradation experienced by customers of Access ISPs AT&T, Comcast, Centurylink, Time Warner Cable, and Verizon when their traffic passed over interconnections with Transit ISPs Cogent Communications, Level 3 Communications, and XO Communications. In a large number of cases we observed similar patterns of performance