Downloading originals so slooooooooooooow

Thanks Carl, after restarting the speed didn't seem to improve but I just left it to see what would happen. After about two days it suddenly started ticking over much faster, still slow, but faster. Not sure what it was doing for those first few days but I'm now getting a few thousand images per day. It will still take a good week or so at this rate, but I can live with that compared to the years I thought it was going to take. Thanks again :)

Just to share my ongoing experience should anyone happen upon this later. It's now been about 10 days. The download finally completed around day 8, at which time everything seemed to be fine. I shut my down computer happy that the saga was finally over, however on restarting photos on day 9, a curious message popped up at the bottom telling me that I'm now "uploading 163,000 images" (and counting). It seemed that for reasons best known to itself, now that all my images had downloaded from the cloud, it was now going to re-upload them all to the cloud. It is now day 10 and about 1000 images have 'uploaded'. I tried shutting down and restarting, but the process just continues on. I'm reserved to just let it run its course and see what happens. I'll repost with any updates, probably in another 8 days.