Getting dial-up modem download speeds

I haven't seen any other posts about this, so I'm assuming it isn't a general issue, but all day today I've been getting eye watering download speeds from Daz of 5-10kbps.
Bought 2 items yesterday and tried to download today via Install Manager - one item was only 26Mb and downloaded slowly, but got there eventually. The other is 251Mb and downloaded to 35% before I wanted to use DS, so I stopped the download in case there was any issue having something install while using DS. I just tried resuming the download now, about 7 hours later, and the speeds are still at a crawl. Then it occured to me to just skip the DIM and go to my account and download the package manually. No luck. The speed is exactly the same downloading directly. To make matters worse, doing that seems to have reset the 35% I'd already managed to get through DIM, so now it's started again from zero.
There's no problem with my internet connection - I'm getting full download and upload speeds, and browsing or downloading from any other site is fine (as is browsing the Daz site, it's only the download speeds that are the problem). Since I have no current interest in G8, I haven't installed any of this week's updates for DS or the new DIM filters etc. Still on DS version 4.9.3.166 64bit and DIM 1.1.0.67. So, nothing has changed since I last downloaded a couple of new purchases on thursday.
I'm inclined to not update stuff that's working perfectly well if I don't have to, after turning a perfectly good iPad 2 into a laggy, barely usable piece of cr*p by needlessly installing ios9 on it.
Just wondering if anybody else is having slow downloads today, even if they're not as bad as mine?
Comments
Speaking of slow downloads, since January 12th, I've been trying to download my order of Essential Iray Shaders. I just tried again and it's pathetic, so I cancelled, again. I think I'm choosing the wrong times. Maybe I oughta set my alarm for 3AM...
This randomly happens to me. I have an old post about this. Try tracing (tracert) or pinging DAZ's download server and check if you're getting timed out. Contact DAZ support and your ISP with your test results and see if they can solve it.