Just a simple physics question: per this link, Cat5e twist rate is lower than that of Cat6, and Cat6 cables are thinner. A higher twist rate means a longer copper wire per length of cable. Both these facts would make one assume that the resistance per unit distance of a Cat6 cable would be higher than that of a Cat5e. Presumably this is not the case, as modern PoE standards are allowing for higher power while keeping the voltage the same, meaning that more power would be dissipated in the cable if it were true. How is this mitigated? Is the copper of higher grade?