True, Zim - over INTERNAL direct connect giga-bit ethernet. USB 1&2 were slower (much) than most disk-to-disk (dma access) - Firewire could handle it, as could certain other 'external' devices connecting to the dma channel. As you point out - the gigabit connects would handily beat the USB downloads. Tape drives (and some optical drives) could/and do handle dma transfer rates - but NOT those that connect via USB.
Very few 'internal servers' have gigabit INTERNET (not ethernet) connections ... especially at both ends - and especially going to Roosha.
I don't see the DNC having that type of Internet backbone available to them. Google,FB,etc. - yes - in the aggregate. From a single server - and a single connection - I would highly doubt it.
Perhaps DE could weigh in on this - more up his professional alley I would think.

Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good ...