Re: Six Sigma and Other Certifications
Charles - definitely agree on your answer; this is much more important than the buzzwords:
having a clear mission, building a great team of people, communicating the mission, setting goals, variable compensation plans that reward performance (and often paying just a bit more than "market"), being honest with folks and thanking them sincerely ... and coming in everyday to make the company better, and better and better. Etc.
To address you original question, certifications are useful in establishing a certain baseline of knowledge in an area but cannot substitute for common sense and your points above.
Good luck and thanks