That is not how I interpret that article. It does not say you can put the sprinkler pipes within the dedicated space. The pipes still have to comply with the rule, and that means they have to be more than six feet above the panel (i.e., above the dedicated space).
What it does say is that we are allowed to have sprinkler protection for the dedicated space. That tells me that a sprinkler pipe that is higher than (but off to the side of) a panel, and that would spray the area directly above the panel, is allowable.