Not true, it's not the delta but specific age.

https://www.theatlantic.com/science/archive/2018/08/online-d... (control-f "How Age Affects Online-Dating Desirability Among Heterosexual Men and Women")

https://cdn.theatlantic.com/thumbor/ElYAU3S0hhWWdqoxqv-4DRi1...

https://archive.ph/Bhwhe (https://theblog.okcupid.com/the-case-for-an-older-woman-99d8...)

https://archive.ph/dHvWf (https://www.nytimes.com/2018/08/15/style/dating-apps-online-...)

https://archive.ph/HqHNr (https://advances.sciencemag.org/content/advances/4/8/eaap981...)