I tried to set up a page template with instructional text > mentions in Confluence 5.2.5.
It's possible but when I create a page with this template, clicking the mention is as clicking an instructional text. The text is simply replaced.
I saw examples where the instructional text for the mention is "@mention ....", yet when I use mention there is no @mention in front of the text. Probably that conveys some meaning to you.
Any guesses?
Tibor Legat