Credible Explanation

Prolific business writer Megan McArdle believes that writers procrastinate because of perfectionism:

I’ve watched a surprising number of young journalists wreck, or nearly wreck, their careers by simply failing to hand in articles. These are all college graduates who can write in complete sentences, so it is not that they are lazy incompetents. Rather, they seem to be paralyzed by the prospect of writing something that isn’t very good.

Finally a credible explanation for your correspondent's compositional tardiness: lofty standards. One can't rush genius.