In my experience, some older folks (over 40) seem to have this weird self-negating issue where they seem to lose confidence in themselves. I've known some truly badass programmers, stuck in shitty positions but don't move because of their own fear. So I think when you say "older folks find it harder to get hired", it becomes a self perpetuating kind of mindset.
The reality is that industry is dying to find people that can get shit done, as Cletus said. It doesn't fucking matter what you look like, your age, whether you have testicles or an ovary or neither like Data from STTNG.
My last gig was with a giant software company. BigCo management announced that my product would be canned in mid-Jan, effective March 31. Within 2 weeks of their announcement I had 4 opportunities (not counting internal opportunities) of which I chose the best one, starting in 10 days.
I'm not doing anything special, but life is good :-)