But you're not being cynical enough yourself. I had looked at your websites, and could immediately see that nobody involved in a business such as yours could possibly have the crude attitudes you were expressing. So I had no doubt that you were attempting to stimulate a genuine debate.
Just couldn't resist winding it up a notch.
Anyway, to return to the point....
As your quite extensive experiment proved, the IT industry exhibits ageist attitudes.
This ageism partly derives from another characteristic of the industry, which is that it's reasonably meritocratic (or, perhaps more accurately, technocratic).
This might seem surprising. If success and advancement are due largely to merit and/or technical ability, then surely age is of even less relevance than usual?
However, a consequence of the rapid reward and advancement of individuals based on their ability, skills, and results is that they are often moved into positions of some authority at quite a young age.
It's normal in the IT industry for people in the age range of 28 to 35 to find themselves in "leadership" roles. They are responsible for running projects (often very large projects). They are responsible for running departments. Part of this responsibility is usually recruitment.
They might not have the final say on recruitment, but they'll often be doing the initial screening of cv's, and the early interviews.
Now, it's a common failing of us all, that we can feel insecure about managing a subordinate who's substantially older than ourselves. This is particularly true when we're young and (relatively) inexperienced.
So, as a 30 year old PM putting together our project team, or as a 32 year old Helpdesk Manager filling a support vacancy, it can be daunting to consider a 45 year old applicant.
This partly reflects the lack of management training in the industry. We respect and reward technical ability, and assume that a technically competent individual will somehow be a good manager!
The early rewards available in the IT industry are a good thing, and many of us on this discussion site will have benefited from them. The downside is that many important decisions (such as recruitment) are being made by people who may lack the maturity and life experiences to fully inform those decisions.