Part of the Agile Manifesto mentions "Customer Collaboration". I fully support that notion that our work should involve close collaboration with the customer. However, to me, collaboration means speaking the language of the customer. And that language should extend to cover all the metrics and analytics that we use. Have you ever had to explain what a Story Point is to a customer? How about Velocity? If you do not like yourself very much, march into your CFO's office someday and try to explain what a Story Point is. However, I guarantee all of your stakeholders understand the concept of elapsed time. I guarantee they understand the concept of the total number of features to be delivered in a release. If we truly want to be Agile, we are going to have to adopt the language of our customers. To that end, we must choose words and concepts that they are comfortable with--not force them to learn a new, arbitrary, and unhelpful vocabulary.