I believe that the statement: "bitcoin is new kind of money" passes the
duck test.
Bitcoins function as money (they're a unit of account, a medium of exchange, and a store of value), and if PayPal started allowing Bitcoin transactions tomorrow I'm certain they'd treat them as Just Another Currency.
If you like, call it a commodity, but I think all you'll accomplish is confusing potential users who might think they'll end up getting pork-bellies delivered to their porch if they don't get rid of their bitcoins.
For me it is the future's money, it will be our new form of currency in the business world. I can call it a money because I can exchange my bitcoins into a real money in the bank. And I'm using it as my another source of income.