I use "old" for shock value here while being totally in the camp that companies would do well to find ways to use older, more experienced talent at a lower cost than "normal". (Even after I have run into "older" as inflexible and a pain to work with.)
But there is also another problem in many of these reports: Older and still applying by sending resumes in response for job postings! If you are older you should have a network you can use. If they find nothing for you - or don't care to talk to you, then THAT is the better signal. And still not necessarily a signal about the job market.