Just saw the results of this survey poll on LinkedIn that I participated in:

Not surprised that PMI leads the way, but was a bit surprised by how much. I really liked the age and demographic breakdown.
Was surpised how low the ScrumMaster certification ranked in this survey, but I think that has to do with the fact that the barrier to entry is so low (you only need to attend a 2 day seminar and once completed you are a certified ScrumMaster).
As I mentioned in another blog, I think we'll see the PMI adoption go higher with the recent explosive growth of the PMI-ACP certification within PMI. I recently found this graphic showing the growth of the PMP:

Love them or hate them, no doubt when it comes to project management certifications, PMI is dominating the standards and leading the industry to a near monopoly especially in the US with growth in the rest of the world following.
As a commenter posted, "in terms of popularity, PMP would take the lead.....however, if a Project Manager does not how to implement the PMP processes in your working project environment, just 'knowing' the terminology either from PMP or PRINCE2 will not matter...."
I wholeheartedly agree, but if your going to get certified, the best direction seems to be the PMI-way.



