How's your AQ?

I was reading the lists of the businesses that made it the Profit 100 fastest growing companies list, and I was reminded of one of Rick Spence's recent Twitter postings. He commented, "Being an entrepreneur is like being punched in the face, frequently, but to have the ability to keep on going."
Something like that.
Like Rocky, my favourite movie character, said, "It's not how hard you can hit, but how much you can take and still keep moving forward.
So, when I emailed the many entrepreneurs I knew from the Profit 100 list, I mentioned that their adversity quotient must be very high. Most of them understood what I was saying, but a few wrote back asking if this was their "pig-headedness" quotient too!
Here's a quick summary of AQ:
Adversity Quotient, called AQ, is like Intelligence Quotient or IQ.
AQ is the science of human resilience.
People who successfully apply AQ perform optimally in the face of adversity — the challenges, big and small, that confront us each day. In fact, they not only learn from these challenges, but they also respond to them better and faster. For businesses and other organizations, a high-AQ workforce translates to increased capacity, productivity, and innovation, as well as lower attrition and higher morale.