I read the article and while I have nothing but respect for Mr Rechnitz, I think the "age" issue is just one symptom of a much greater illness not a cause.
As an aside, I think I am somewhat qualified to comment on this as I have been a shadchan for many years.
The issue is not due to the age gap. it is due to misplaced priorities. While there is probably a higher percentage of single girls these days then there was in the alter heim, it is mainly societies fault for stressing all the unimportant things. While I dont want to minimize the pain and suffering of many of the single people out there, much of is due to their own unrealistic expectations.
After the holocaust, people just married the first Jewish person that they could find pretty much. No one had money and people were just happy to find someone who was Jewish and alive.
Today, the focus is on all the wrong things: money, looks, age, status, etc.
As a result of this misplaced focus, many people are suffering because either they are being constantly rejected or they are rejecting people for all the wrong reasons.
I see it all the time. I get a fat shlubby 50 something year old who has never been married who wants to marry a girl of child bearing age.
I have one question. If you couldnt get a girl when you were 35 what on G-ds earth makes you think you will get a 35 year old now.
People need to stop focusing on stupid details and just look for the 3 traits that the gemara says. Rachmanus, Bayshanus and Gmilas Chesed. Of course looks are nice, but they should not be to the exclusion of everything else.
Further, the reason we have so much divorce today is a result of this me first attititude.