Fastest Cable for Shooting Tethered?

[Parabola]

Currently using a 5D Mkiii to shoot tethered into an iMac (27" 2.9Ghz. Hybrid SSD HD. 24GB RAM. OS 10.9) running Capture One 7.
We're shooting fashion, the RAW files are pretty large, so we're now shooting sRAW (Slightly smaller RAW files) to try and speed up the transfer to iMac.

The Creative Director likes to see the images on screen almost instantly (To know when we've got the shot.)
It's all quite fast paced. 60+ outfits a day.

Currently using a 5 metre USB2 cable from Maplin.
I think the Canon 5Dmkiii doesn't support USB3 or Thunderbolt cables.

Can any recommend a faster cable/solution. Couldn't find much relevant infer on Google.

Thanks.

[Bacardi]

Haven't had a problem when shooting fashion and whenever possible, shoot tethered. Sure, there is a slight delay, but the ADs are happy to watch the pics as they appear while I click away, they can see if they have the shot,even if it's a second or two behind realtime. I shoot shoot big RAW and to a conventional HD.

It's quicker than it used to be, but the delay is C1 having to write previews, proxies and thumbnails before it will display on screen. I don't think another cable will help, USB2, is what it is. I use cables from http://www.lindy.co.uk happy with the quality.

[andybuk99]

I don't have any problems shooting fast with an Aptus 75 via firewire, a second or two and they appear. If the director isn't happy with that I would suggest that he is being unreasonable.