Fitted a set to 6700 group on a Madone with internal cable routing (WTF?), and first off, the brake cables are a real pain in the ***. Very stiff and just a wee bit larger than stock cable so they don't easily fit into the 6700 caliper adjusters easily. Also, cable length is super touchy. Too long, and the cable adjuster gets pushed too far to one side and doesn't adjust well. But, they do have a nice feel. Very smooth. Rear lever is just buttery smooth.
Derailleur cable was much easier (though again, internal cable routing WTF?). It's hard to say exactly, but shifts do seem to happen faster with less effort.
I've found the 6700 levers to have some touchy shifting with the rear derailleur. By the far the most finicky setup I've used. So far I'm not having the issues I had with the stock cable with the Yokos. Hopefully that continues.
I do wish the brake housing was exactly the same size as stock though. And I don't think I'll get a frame with internal cable routing again. Just don't see the point.
Derailleur cable was much easier (though again, internal cable routing WTF?). It's hard to say exactly, but shifts do seem to happen faster with less effort.
I've found the 6700 levers to have some touchy shifting with the rear derailleur. By the far the most finicky setup I've used. So far I'm not having the issues I had with the stock cable with the Yokos. Hopefully that continues.
I do wish the brake housing was exactly the same size as stock though. And I don't think I'll get a frame with internal cable routing again. Just don't see the point.