timppu: Luckily he rebooted his computer as that seemed to clear the issue (ie. congestion of the GOG servers). :)
Kakroom: I restarted my computer, which briefly brought the download's speed up to 2,000 per second, which is about what it's supposed to be, before it went back to normal.
He confused the issue by using the word normal. I think he meant 'bad' normal, not the normal normal.
So by what he wrote, I take it that any improvement was only brief, so unlikely to be reboot related.
He may have an ISP issue of course, which was briefly better after a reboot.
And of course, a different position in the queue afterward.
timppu: Seriously though, I am pretty sure that most of the of the time, the reason for (very) slow download speeds on GOG servers is something else but congestion on the download servers themselves. Seeing these same discussions, quite often at least Galaxy downloads seem to be blocked or throttled by the software firewall or antivirus.
I say this partly because I practically never see, at least nowadays, that kind of variance in GOG download speeds. At worst it is something like 3Mbytes/sec or so, and even then I think it is quite often my system causing the slowdown (e.g. because I am downloading the games to an external USB HDD that is using the NTFS in Linux, which seems to cause some kind of I/O bottleneck...). If I try e.g. at my work directly to a SSD, I easily get 10-30 Mbytes/sec download speeds, every time.
Many years ago though I recall sometimes experiencing some downloads to come tops 400kbytes/sec from GOG, and then merely restarting the download would yield higher download speeds. I don't know what that was, it appeared as if some download servers on GOG would throttle it to 400kbytes/sec. But I haven't seen this happening for years.
I always make sure to specify more than congestion. as location and time of day always make a difference too ... along with GOG bias settings for certain locales at certain time periods I am sure.
Even just a change from a home connection to a work connection, can make a big difference in certain circumstances, especially if work is in the big smoke and home is in the suburbs. Many things can throttle or effect bandwidth, and if you have a poor connection to GOG as well, anything can happen. No doubt increased failures of data delivery impacts download speed with resends.
In this latest case, I also specified Easter Weekend maybe impacted. I know my local congestion was worse, similar to what it is like on a Friday (late afternoon, evening in my neck of the woods ... regular as clockwork).
Generally I get around 5 MB/s for download speed but that kept fluctuating near the end of the sale, with it sometimes being as low as around 3.5 MB/s for a good period.
So sales do impact, and I have seen that all too often, to not consider it a fact now.
That said, GOG servers appear to be better than they were a few months ago, where I regularly got bad download speeds from them.
Anyway, a mix of factors I am sure.