Dynamic Audience in Experience Targeting

I need a definitive answer on whether an XT (Experience Targeting) Activity will run our Profile Scripts every time, checking the parameters that are passed back from at.js running on page load.

We are checking parameter values in our Profile Scripts to decide and output a string which then an Audience uses to determine if a visitor belongs to that Audience. On our page we are using targetPageParams to add to the parameters pass to the Adobe cloud, and this works for A/B Tests.