A899 No. Augmented creatures are only of their new type, the subtype only defines their features (as in looks).

An example can be obtained from familiars, which are Magical Beast (Augmented Animal) (cf. Augmented in the Glossary).
Quote Originally Posted by PHB, Familiars
...it is treated as a magical beast instead of an animal for the purpose of any effect that depends on its type.