Well I have kept/bred bibrons for quite a while now and although I
know they could eat a pinky (or anything else small enough to fit in their mouth including their mate's tail) I can tell you I've never done it. I don't think bibrons run around in the forest stirring up mouse nests to eat their young
Fledgling birds, small lizards - sure. Mice? Hmm.
An adult male is quite capable of eating a pinky. I'm not so sure about females - they are obviously much smaller. Maybe this is what was referred to in the article.
Nonetheless, I prefer an purely insectivorous diet for my bibrons. Before and after pseudo-brumation, I fatten them up with waxworms. I leave mice for the snakes
For reference, an adult male bibrons had a head width of about 1". I think that is big enough for a whole pinky.