Only if you interpret what they are saying in the way that they intended you to, despite the fact that it's not what they are explicitly saying. When they say

Only if you interpret what they are saying in the way that they intended you to, despite the fact that it's not what they are explicitly saying. When they say "Facebook were disguising ‘sponsored posts’ as regular posts", all that means is that Facebook changed something in such a way that Adblock Plus was no longer detecting it as a "sponsored post". It doesn't mean that sponsored posts looked the same to users as regular posts.