If tetryon glider procs per shot, and +80-120 dps is observed on the DHC, then we should be seeing around +160-240 extra dps on the DC. However, this is not even remotely supported by the results. Experimental error and randomness cannot explain away this high discrepancy. I suggest running your own tests to add to the data.
Do you have any thoughts as to why the DHCs seem to receive a larger boost from the proc than the DCs did?