from what i have read no this is still classed as quadpedalism as it is based on which is used for a majority of the time. I.e. chimps are classed as quadperdalism as they use their fists mostly when they walk, but can do small movements bipedally.
Quote:
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Originally Posted by Spotlight Biology p. 275 1e Bipedal Locomotion:
The S-shaped spine of humans allows the centre of gravity to fall over the hips, whereas the C-shaped spine of chimpanzees has a forward centre of gravity |
and info from other books and work, also suggest this.
Hope that helps