I recently was in Greece and added 5GB of photos to my Dropbox so that if I had my camera stolen (or left it accidentally on a bar table) that I wouldn't lose the photos.
The problem was that the photos only uploaded at a rate of around 50kbps to 70kbps from the hotel (wired connection).
Fair enough... must be hotel or local internet access.
Frustrated at the speed I tried a local internet cafe... same speed.
I didn't actually manage to get all of the photos uploaded and when I was back in the UK I plugged in and they continued to upload at the same rate. Even though I have a 10MB uplink here.
I ran some quick tests uploading large files to a few boxes I have in different places, and all achieved at least half a meg upload speed. Dropbox stubbornly remained on less than 100kbps.
I'd tried unchecking the "Limit upload rate" both whilst in Greecen and in the UK, to no avail. Not that I would spend more time on this than it needed, I'd already made a second copy of my photos by copying them to the laptop.
Before this trip I hadn't prioritised upload speed for a cloud storage provider, now I would.
I'm fine paying twice what Google charge, but still want 2 things more than anything:
1) Client side encryption of all non-public, non-shared files.
2) Faster upload speed.