Verizon Fios is the top gaming ISP among major US service providers while Iowa's Cedar Falls Utilities (CFU) took the honors among all qualified ISPs, according to a new PCMag study that measured and emphasized latency and jitter performance rather than just raw speed. Click here for a larger version of this chart. Though Verizon Fios' Gaming Quality Index of 19.7 was tops among major ISPs, it lagged last year's result of 16.9. With smaller, qualified ISPs included, Verizon Fios would've ranked No. 12 on the Gaming Quality Index. "But it's certainly the best you'll see from any ISP in this list with over 1 million customers," PCMag noted.