There is more matter around than antimatter? Which, of course, can't be a true statement on the face of it.
From the article itself: "Every kind of ordinary matter particle has an anti-matter partner with opposing characteristics -- and when matter interacts with antimatter, the two annihilate each other." "Interacts with . . . " A term far too mild for what happened, and what is happening.
Observing that there is little to no antimatter to the universe is like observing that there is little to no concavity to the universe to go with the convexity of the universe: or little to no negative energy to go with positive energy. Matter and antimatter are no more, no less, than two sides (said 'partnership') of exactly the same coin. There are differences in things in the universe, but there are no differences to the two sides of this one most singular coin, except one and one only difference built into naked singularity (thus the ultimate in difference). Particle colliders tell us that unity can be taken too far (that reduction to naked singularity won't be allowed universes in general beyond a certain built-in point).
Just because all we observe to the universe is convexity (+) doesn't mean concavity (-) doesn't exist in exactly equal part.