In JIRA 6.4 (I think) Atlassian changed the list of Default list of JIRA Priorities from Blocker, Critical, Major, Minor, Trivial etc. to Highest, Higher, Medium, Lower, Lowest. Our plan is to change to the new values, since our values have been tempered with in a strange way.
I have tried to find some writing around the rational behind this change, since I consider Atlassian to deliver and change their Products, based on Best Practices.
My reason for asking is that in my Company, there are som User Groups that suggests other values and I want to bring the right ammunition to the table.