Cablevision promises cable modem subscribers speeds of 15 Mbps, and its Optimum Online customers are seeing average download speeds of about 90 percent of its advertised speed during peak hours, the FCC said Monday.

Four months after criticizing Cablevision and other providers for failing to deliver on the broadband speeds that they tout in marketing materials, the FCC praised Cablevision Monday for getting closer to delivering advertised speeds during peak hours. When the FCC released its Measuring Broadband America report in August, it said Cablevision customers were only receiving download speeds of 50 percent of its advertised speeds.

"We are pleased to note that the performance of one company--Cablevision--markedly improved from earlier this year," Joel Gurin, chief of the FCC's Consumer and Governmental Affairs Bureau, wrote in a blog post Monday. Cablevision was the only provider Gurin named. 

The high-speed Internet speed data Gurin cites was collected in April. The data the FCC used for its Measuring Broadband America report was collected in March. In its August report, the FCC said Cablevision rival Verizon and Comcast delivered broadband speeds that were faster than they advertised.

Cablevision executives appear to be taking FCC scrutiny of its broadband speeds seriously. In addition to increasing its average speeds during peak hours, Cablevision is the only high-speed provider to commit to offering discounted high-speed Internet access service to low-income homes that are as fast as its standard service. While Comcast offers low-income homes that qualify for its $9.95 monthly Internet Essentials service speeds of at least 1 Mbps, Cablevision plans to offer 15 Mpbs connections to low-income homes for the same price.