I suspected it was bait, but FreeBSD jails being better than whatever Linux has is such a common meme that I'm asking anyway just in case someone actually knows enough about them to answer.

I don't know enough to say for sure, but my current impression is that Linux namespaces are actually more powerful than jails, but harder to use because the kernel doesn't provide a "simple" interface to create an isolated container, and userspace software implementing containers get to use the individual bits as they see fit.