Is it possible to use URL query to populate data in the Description of a form?

I'm looking to have a form be pre-populated by following the steps laid out in this article.

Instead of having the URL query pre-populate the data in the form, is it possible to capture that data and display it in a dynamic description?

For example using the situation in the original article, instead of pre-populating "Sally Smart" in the rep field, it would be great if the description would display "Hello Sally Smart" or something along those lines. I'm not sure if it's possible to reference form entries in the description but that was my original thought.