Just wanted to add to this. Also a huge Altra fan.
The stats is this article are so general they don't make much of a point at all. Most upsettingly for me (a minimalist evangelist) they seem to dismiss barefoot style shoes out of hand.
For me Altra have made the key components of barefoot running accessible: no heel - so I land forefoot, wide toe box - so my toes can splay and some cushioning - making at accessible.
If you are a 50kg elite runner with narrow feet and perfect technique the shoes probably won't make as much difference to injury as your average 80kg runner with dodgy technique (like myself!!). Altra have been a game changer for me.