The comment about the data transfer rate was made long ago.
I believe it is a valid argument.
Of course the DNC has never given anyone access to the server itself. Am sure it has been thoroughly wiped since then.
The NSA whistleblower who was originally did research and showed the speed of download was too fast for internet, and had to be a thumb drive in DNC was on OANN News Sunday Morning. He validated that info again. It was news now because Rosenstein and Mueller indicted 12 Russians, who are innocent of that DNC HACK< there was NO Hack, it was leak and probably when Seth Rich got info for WikiLeaks!