Without accurate numbers from a reliable source, this discussion, like many other shidduch crisis discussions, is too speculative to be meaningful. First of all, as L613 reasonably asked, how old is “older”? And what makes the number of unmarried “older” men “terrible”? That is a strong word for an unknown number.
I think part of the problem, as perceived, is that there is no allowance in the estimates of the “crisis” for persons (of both sexes) who choose to marry later than age 22.
Second, if there is in fact a crisis, I believe that part of the reluctance of young couples to commit to marriage is the untenable economic situation required to support a learning chosson who has not attended college and acquired the skills needed to earn a living. I think that time is running out because the supply of parents willing and able to subsidize married children – which in the post-World War II boom in the US led to unprecedented levels of wealth – is dwindling, especially since the bust of 2008. I expect that this will prompt a rethinking among frum Jews of their “economic model” of life in which a chosson learns and his kallah supports him and raises his children. The subsidies from the prior generation are drying up.