I respectfully disagree that you can tell whether or not a person is "capable of stretching himself" or not based on length of stay at a job. There is an overw

I respectfully disagree that you can tell whether or not a person is "capable of stretching himself" or not based on length of stay at a job. There is an overwhelming amount of outside factors that can dominate those decisions much more than your own personal ambitions. The most important of those would be the needs of your family.