Only if the number of people running is small. If there's a large enough number of people running up the escalator, then the capacity will be increased over everyone standing. It's quite simple.

According to the article, the problem they had was that on really long escalators, not many people bothered to run, so the capacity was indeed too low.

The solution is simple: cattle prods for people on the left who run too slow. That'll get them up it faster. Seriously, what a bunch of lazy people. I can understand elderly or obese people not running up the escalator (which is why the right needs to be reserved for them), but the rest of you have no excuse.