It's not the cable length, USB 2 and 3 will both operate reliably over 5M.
It maybe a problem with the USB controller in the laptop, the Yoga series more than likely make plenty of compromises in order to keep them thin and light.
We run ours into the USB2 port on a dock station with HP laptops. File transfer speed has never been an issue, so if it works in a USB2 port then at least you can use it.
To really find out if the cable is the problem you need to try it in a desktop workstation or a more serious workstation grade laptop.
All of ours have worked well out of the box, and failed after 3-6 months of use.
Of interest, I'm currently running 2 5DS into a laptop, one on a single 5m cable handheld, and other on a 5m powered extension into a 5m cable and it's been working well.
I have been reading the issue may be with the laptop's power, but if I understand it correctly, the TetherTools PowerBoost is supposed to help with that.
As you said, the USB2 port does work and that is what I am using for now, but it certainly isn't what I want.
Will report back once I have tested with my primary machine (which, sadly, I can't take with me on research trips).

