Once again, the FCC has put a wide range of Internet service providers to the test to see whether or not they are delivering on the speeds they advertise to customers. And while it the majority of ISPs are not far off, with a few actually over-delivering, some still have a way to go.

The above chart doesn’t indicate which of the ISPs was fastest or slowest, merely how each ISP fared in delivering the speeds promised in its advertising to consumers. So while you can’t look at it and say that Cablevision provides a faster service than AT&T, you can use this info to decide how willing you are to accept a company’s advertising claims.

The chart at the bottom of this post shows in greater detail the actual sustained download speeds per tier per provider.

This is the first time that the FCC has included a satellite broadband provider in its Measuring Broadband report, and ViaSat, which we told you about when we got a hands-on demo at the 2012 Consumer Electronics Show, made a pretty good rookie showing. Not only did it deliver speeds faster than the advertised 12 mbps downstream that ViaSat advertises, it had the highest actual/advertised ratio of all the ISPs in the study.

“While latency for satellites necessarily remains much higher than for terrestrial services,” writes the FCC, “with the improvements afforded by the new technology we find that it will support many types of popular broadband services and applications.”

Here is the per-provider, per-tier breakdown of actual sustained download speeds:

You can check out the full test results and report HERE.

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