Agreed. Things are probably not as ideal as that post makes them sound.

What facebook is essentially saying with this post is: "We're an engineer/programmer-driven company. If you're a good engineer, you'd like working here."

The hoped-for effect is probably to continue attracting good engineers. Many companies that aren't engineer-centric probably wouldn't even know how to say this in their official blog, much less actually bother to say it. So the fact they're saying it still carries some weight.