It says for the Carpenter Ants on the label but it works for all of them.
From the moving creatures till not was about 10 hours. They carry the food into the nest, I am sure the queens are dead too. 
One is gel and one is dry (size and shape of the corn meal). Sometimes they prefer one and sometimes the other one.
That what companies use when you call them with your ant problem.

 

Looks like a product that might do the trick. Will definitely check it out. Thanks for sharing.

Interesting observation:
Many of those fallen ants are eaten by crickets!
They are quite annoying, if you ask me. Maybe the poison in ants can kill those larger guys too?
That would be awesome! Hitting two targets with one stone :)

Wow, you should try to sell those photos to the company that makes that stuff!

Phil,
A great idea! I totally should do it.
Esp. if the crickets will be gone as well.
I like that the products are not too harmful to humans (or so it seems) since they recommend them for use pretty much everywhere.