According to the definition outlined in the article, I would be considered a "hopper". I've been gone between full-time freelancing and being a senior employee in 3 start-ups over the last 5 years.
Looking just at my employment history at face-value, you could determine (taking the article's definition of dedication and commitment) that I was not truly dedicated to the long-term success of the companies I've been involved in.
The real story, of course, is that there's a lot more beneath the surface. Instead of blowing me off, ask me about the extent of my dedication to each company. I'm absolutely convinced that I've sacrificed, failed, and subsequently learned more in 5 years of "hopping" than the majority of "dedicated" employees who spend the same amount of time in a single job.