There's no doubt that Google switching to Java / C++ / Go, better JVM goodies, C#, node.js and the uncertainty surrounding Python 3.X is hurting python a little.
This is a honest question, in my environment I see Python being adopted in various places now that is maturing.
BTW: it hasn't been a "new and hip" language for quite some time, version 1.0 was released in 1991 and 2.0 was released in 2000. The pure novelty-seekers left a long time ago.
At one of the companies, they were using only C before (and some PHP/Java). Python was chosen for its merits (large support library, user-friendly language, lot of developers know it, relatively light embeddable VM), not because it was already entrenched in the organization.
Perhaps lots of HN readers happen to like working in Python.
Perhaps Python consultants figure that HN is a relatively promising place to seek clients.
Perhaps Python's community has fewer alternative venues in which to advertise.
Perhaps it's just nucleation: The first two Python posts attracted other Python posts.
All guesses of course, no data.
C developers, by contrast, are more likely to stay at the same company for 5 or 10 years.
Where I am (London), the demand for python skills is immense, even by tech-job standards. It's possible that there is a falling-off of demand elsewhere, of course.
I guess like most freelancers, the people on there might already have a steady stream of work, and are just marketing themselves since python is the in-thing right now?