Wolof language gaining strength in Senegal at the expense of French?

That's according to this article, which asks if Senegal is still a francophone country. According to it Abidjan in Côte d'Ivoire still prefers French for both international and national communication, but in Dakar (Senegal) Wolof is spoken not just as a local tongue but also as a language of education and intellectualism as well, and this makes it difficult sometimes for even other francophone Africans to ask for directions there.

There are 34 comments below the article, the first one mentioning that Senegal != Wolof, and that French works as a common language within the country itself.

Another comment below links to a source saying that 35% of the Senegalese population 10+ years of age can read and write French. Another survey on 1000 individuals 15+ years of age shows that 72% to 74% of those in Dakar can express themselves in French, with 30% "with difficulty". There is a lot more information to be found in the comments below too.