Interesting. I was aware that this new API exists. I've not seen an app use it yet. I was not aware it could narrow the selection down to just a single contact

Interesting. I was aware that this new API exists. I've not seen an app use it yet. I was not aware it could narrow the selection down to just a single contact property. The documentation does not make that clear. Nevertheless, apps like Facebook aren't going to use this as they want the whole address book and not a single person.