Jguk has only one criterion on whether he supports or opposes a request for admin status (though he will oppose if a user meeting that criterion has a recent pattern of acting disruptively - my "sense test override").
User has demonstrated they know this is an encyclopaedia
User must have contributed to the Wikipedia namespace
User will have had to liaise constructively with other Wikipedians (either in preparing the article, or in dealing with oppose votes)
To write a featured article, the user would have had to be familiar with the featured article criteria and our standards - any user will take some time to pick this up
Sets a clear goal of how to get my support for adminship (subject to the sense test override)
Whilst featured articles aren't the be-all-and-end-all of Wikipedia, to create one means you have to show lots of qualities that are desirable in an admin.
We have loads of admins anyway, so we can afford to be picky.
Note:This is my personal test. Other users have other tests. I am not proposing that it becomes policy, and others are welcome to follow it or not follow it as they wish.