SEO: How much does domain name keywords matter?

I have always wondered if having keywords in your domain name matters for SEO purposes. I would read one article that seems to suggest it does, but then another article would repute that claim saying there are many other factors.

I have concluded that it does matter, but now I want to know to what extend?

So today I am testing this new keyword laden domain:

If my test goes as plan, your search for “profit and loss templates” should show my domain in a couple of days.

Btw, to keep all things even, the domain does have a lot of original content relating to profit and loss statements.