But there are some factors you should consider. In the first place, the numbers above don't really mean much until we add a little more context. You need to ask over what period the growth rate has been annualized. So the earnings doubled over one quarter. Maybe, maybe not.
Some dynamic companies do grow that quickly.
Know, though, that most companies don't see their earnings growing in a straight line. Some quarters may be good ones, some might reflect temporary slumps in business. If you annualize numbers over any short-term period, the big picture can get very distorted. This is true for mutual funds, as well. And actually, they have to slow down.