From the DNC inside job story in The Nation, here:
Forensicator’s first decisive findings, made public in the paper dated July 9, concerned the volume of the supposedly hacked material and what is called the transfer rate—the time a remote hack would require. The metadata established several facts in this regard with granular precision: On the evening of July 5, 2016, 1,976 megabytes of data were downloaded from the DNC’s server. The operation took 87 seconds. This yields a transfer rate of 22.7 megabytes per second. ...
Time stamps in the metadata provide further evidence of what happened on [Tuesday] July 5. The stamps recording the download indicate that it occurred in the Eastern Daylight Time Zone at approximately 6:45 pm. This confirms that the person entering the DNC system was working somewhere on the East Coast of the United States. In theory the operation could have been conducted from Bangor or Miami or anywhere in between—but not Russia, Romania, or anywhere else outside the EDT zone. Combined with Forensicator’s findings on the transfer rate, the time stamps constitute more evidence that the download was conducted locally, since delivery overheads—conversion of data into packets, addressing, sequencing times, error checks, and the like—degrade all data transfers conducted via the Internet, more or less according to the distance involved.