EDIT: Here's the answer.
It really is 6.03GB.
The downloader is lying about the progress of the download.
I see... I've been confused/worried by the downloader showing it being up at 19.63 of 6.03 GB while the file is apparently only at a mere (and considering to d/l time way too low seeming) 2.82 by now to boot.
Eh, I guess I should've used the other download after all. If it doesn't look much closer to being finished tomorrow that's what I'll do.