At least in my area, most DSL providers derate their offerings based on distance from the DSLAM, so they're transparent about this... e.g. punch addresses in a

At least in my area, most DSL providers derate their offerings based on distance from the DSLAM, so they're transparent about this... e.g. punch addresses in a small town into the CenturyLink website and you will see the offering decay from 15mbps to 3mbps as you get further from the phone exchange. I'm surprised that Frontier wasn't doing the same, or perhaps they were but being far too optimistic in their estimate.