Is there such a thing as an ambivert?

I thought this was a very interesting link.
http://brillianceinc.com/are-you-an-ambivert/

I took the test and I came out ambivert (not a word in Google spell check, BTW)  but I wonder if everyone who takes the test comes out this way?  um
I am skeptical of all sociological (well, okay even quantitative research since about 3 years ago.)

You're an ambivert. That means you're neither strongly introverted nor strongly extraverted. Recent research by Adam Grant of the University of Pennsylvania's Wharton School of Management has found that ambiverts make the best salespeople. Ambiverts tend to be adept at the quality of attunement. They know when to push and when to hold back, when to speak up and when to shut up. So don't fall for the myth of the extraverted sales star. Just keep being your ambiverted self.

For more on attunement and ambiversion, see Chapter 4 of To Sell is Human.

Here is the link to the test: http://www.danpink.com/assessment

Here is one more link from a guy who just calls himself an introverted extrovert.  What about an extroverted introvert?  Or like the above people, just make up a new name.

(Trivial comment:  Is Googled a verb in the dictionary yet?  Don't you think it should be?)

http://gillmeister90.wordpress.com/2013/04/08/the-introverted-extrovert-a-true-story/