Had Comcast install Blast (50/10) service here a couple weeks ago. Shaperprobe verifies throughputs are pretty much spot-on. Here's a screenshot showing 3 bonded upstream, 6 downstream, and some fairly impressive signal levels & SNR. Helps to only be ~1/4 mile from the fiber node even if much of the coax cable plant itself is ~30+ years old. Using Zoom 5341J DOCSIS 3.0 modem purchased @ BestBuy. So far so good, stable and consistent speeds.
Location is Clinton Knolls area (west), Town of Clinton, Hunterdon County, NJ, 08809