I doubt that the phenomenon is any news whatsoever.
What is news is that a web portal can now quantify the issue, crunch data and provide some stats for the general public.
Successful people of any sexual orientation have tended to acquire a much younger, more difficult to get, usually very attractive partners for a very long time now. Everybody can buy a second-hand Saturn, but few can afford a Ferrari... This is an opportunity for your success and achievement to shine... .
Now, a number of young guys out there have grown up in a very materialistic world. Permanent struggle to make the ends meet, so pervasive in many formerly "middle class" families has left indelible scars on the youth. The idea that you can be reasonably happy with anyone who provides for your material well-being may sound a bit outlandish to some of us, but to a dude who is struggling to put some food on the table while coping with a crushing amount of loans and debt accumulated at college, the idea may have quite some appeal.