Gigablast same speeds as 300 Mbps package

A few days ago I signed up for Gigablast, this is DOCSIS not fiber.  I bought a new modem, Motorola MB8600, and have yet to see anything close to 1 Gbps.  Today a service technician came out and using his meter direct into the modem tested my connection at about 950 Mbps.  While he was here, I then plugged my laptop directly into the modem and conducted another speed test from the Cox website.  The speed test was right about 300 Mbps connected to my laptop with a 1000 Mbit NIC and a CAT6 cable.  I get the same results once I pass traffic through my router.

The technician told me it was likely my equipment.  This makes no sense to me as the equipment I tested with was a direct connection to the modem.  I had high hopes for a Gbit connection, however this is quite disappointing and seemingly not worth the difference in the bill if I can't get decent results.

I've seen several other posts very similar to this same situation.  What's going on Cox?

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  • And here's the same connection data after a few hours:  Why so many uncorrected in the 903-927MHz range?

       Downstream Bonded Channels  
      
       Channel Lock Status Modulation Channel ID Freq. (MHz) Pwr (dBmV) SNR (dB) Corrected Uncorrected
    1 Locked QAM256 33 357.0 -2.1 38.4 0 0
    2 Locked QAM256 1 783.0 -4.3 37.5 1 0
    3 Locked QAM256 2 789.0 -4.6 37.2 1 0
    4 Locked QAM256 3 795.0 -5.0 37.0 3 0
    5 Locked QAM256 4 801.0 -4.8 37.3 0 0
    6 Locked QAM256 9 831.0 -4.9 37.5 6 0
    7 Locked QAM256 10 837.0 -4.9 37.5 2 0
    8 Locked QAM256 11 843.0 -5.0 37.3 6 0
    9 Locked QAM256 12 849.0 -5.0 37.1 7 0
    10 Locked QAM256 17 879.0 -4.6 37.2 7 0
    11 Locked QAM256 18 885.0 -4.8 37.0 15 0
    12 Locked QAM256 19 891.0 -4.9 37.1 13 0
    13 Locked QAM256 20 897.0 -5.0 37.0 16 0
    14 Locked QAM256 21 903.0 -5.2 37.1 5350 27259
    15 Locked QAM256 22 909.0 -5.5 37.1 9548 42591
    16 Locked QAM256 25 927.0 -5.5 37.3 5150 26937
    17 Locked QAM256 26 933.0 -5.7 37.3 15 0
    18 Locked QAM256 27 939.0 -6.0 37.2 11 0
    19 Locked QAM256 28 945.0 -6.0 37.2 6 0
    20 Locked QAM256 29 951.0 -6.5 37.1 13 0
    21 Locked QAM256 30 957.0 -6.8 37.0 6 0
    22 Locked QAM256 34 363.0 -2.1 38.3 0 0
    23 Locked QAM256 35 369.0 -2.0 38.7 0 0
    24 Locked QAM256 36 375.0 -1.9 38.5 0 0
    25 Locked QAM256 37 381.0 -1.8 38.6 0 0
    26 Locked QAM256 38 387.0 -1.6 38.7 0 0
    27 Locked QAM256 41 405.0 -1.1 38.7 0 0
    28 Locked QAM256 42 411.0 -1.1 38.5 0 0
    29 Locked QAM256 43 417.0 -1.1 38.8 0 0
    30 Locked QAM256 44 423.0 -1.0 38.7 0 0
    31 Locked QAM256 45 429.0 -1.1 38.8 0 0
    32 Locked QAM256 46 435.0 -1.2 38.9 0 0
    33 Locked OFDM PLC 159 300.0 1.0 39.0 0 0
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