Bit of a bump, but Crashplan has finally finished uploading all 2.7TB of data from my MBP and Time Capsule…
It's taken five months to the day to upload just under 3TB.
It's not entirely fair on Crashplan, because it's not been a constant connection. I take my laptop out of the house for at least three full days a week, I've had weekends away on top of that and I don't always have it running when I am home.
Having said that, I did change a lot of settings in order to reduce the load throttling which is built into the default settings. God knows how long it would take if I hadn't done that, but I can guarantee that I'd still be a long way off at this stage.
In the meantime, I've tried out Hubic, paired up with a demo of ExpandDrive. Initial tests seemed positive, but it's a real pain that ExpandDrive doesn't show you the current upload speed and progress bar, which made it quite difficult to gauge its effectiveness.
I'm still waiting for Amazon to release the complete unlimited storage for Prime customers in the UK, which I think will be the best overall solution.