So much of contemporary Hindu thought arose in the first millennia AD. Hinduism might inherit from the religion of the Vedas, but it is by no means identical and all in all, "Hinduism" seems a recent phenomenon, certainly not the oldest religion in the world. Furthermore, even the Vedas and Upanishads that Hinduism points to show a succession of religious beliefs, from the early emphasis on horse sacrifice and drinking soma to the more abstract philosophy of later texts.
As for the connection of Hinduism to haiku, the author seems completely batty.
EDIT: Hey, that linked article is just a veiled advertisement for custom paper writing services for uni students. Hasn't OC.net seen a problem with this kind of spam recently? Give us some assurances your account hasn't been taken over or something, Dnarmist. :-)