People need to remember that there are so many issues with this.
For one, the documents they want to see might not exist at all. For another, even if the documents do exist they might not say what they expect. And then if they do exist and they say something noteworthy, Congress can't really force the executive branch to release them. And even if the executive branch decides to release them, it might be legitimately too incompetent to actually do it.
There are so many different things that can go wrong to prevent the thing people are getting excited about.
That's why this is rightly considered to be something of a stunt.
@volkris fair points.