The author of that article is not credible.
Yeah, I don't care for the article either. For example, I'm trying to make heads and tails out of this: "Daito-ryu aikijujutsu is one such splinter style that has somehow managed to adhere to the traditional teachings of its core style forerunner (daito-ryu) and its predecessor (aiki)."
That said, I agree that in general that Daito-ryu incorporates ample striking (at that, striking is a subset of atemi utilized in Daito-ryu): for example, it's utilized throughout the Hiden Mokuroku techniques, if one requires a canned reference (sample waza: http://youtu.be/bvla9IRwtb8
), and the body movements built on spiraling set up ample opportunities for striking in free-form application. As with any art, the efficacy of the strikes depends on the degree to which the atemi-waza is applied and tested with resistance within and outside of the waza.