I'm a bit confused about difference between cable and fiber heh :)
Sorry, it was a typo. I meant 2/3 (including common cables and fiber optics), not 1/3.
Depends on what kind of cable? As twisted pair network cable is at 2/3.
What an embarrassing typo! I was thinking of 0.66, and somehow I thought 0.66 = 1/3 (must've been distracted by the "2" in 1/2). I should've written 0.66 or 2/3.