It never fails to amuse me to see job advertisements that state "hit the ground running" that have been up for more than a month. It especially amuses me when the critical skill keyword, paired with "developer" or "engineer", surveys above median pay for "software developer" or "software engineer".

They are literally searching harder and waiting longer, to pay more for a narrower skill set.

Good luck finding that "javascript applications developer" or "ruby on rails engineer" or "SPARK/RTEMS engineer", guys. If you needed someone to be productive today, all you had to do would have been to hire them last month and give them a $200 book budget.