As for the "i" part of the Ci type, i know if i need to get something done, i can influence or persuade others to help me to achieve our goals together. But I rarely "use" this "i" part because i don't like to rely on others and prefer to do everything myself to make sure everything is perfect. I would like to continue being "C" type and work more on developing my "i" because working with people surrounding you is one of the most important key to succeed in the tough business world.
In my opinion, this test is great and very helpful to understand people's potentials when hiring. For example, "D" ans "I" type people are great for any management positions, while "C" or "S" people will be excellent accountants, statisticians or other positions where specific guidelines for accomplishing the task are set for them.