People (including me) who assume Demon Slayer wield Blunt Weapons are actually wrong.

http://orangemushroom.wordpress.com/2011...ification/

According to Orange Mushroom, looks like Demon Slayer doesn't wield Blunt Weapons. Demon Slayer actually wields a new weapon called Scepters (홀.

I do apologize for people who got their hopes up too high.

You say slayers do not wield BWs, yet the article in your link clearly says it can use both 1h BWs and the new sceptre.
Perhaps this piece of info was edited in later:

Demon Slayers are able to use two weapons. One is the one handed blunt weapon, and the other is a new weapon called a sceptre (홀, which can be classified as a blunt weapon but it’s a new type. Sorry about my mistake, but at least you won’t have to sell off your blunt weapons if you’ve bought them already!