A pedantic note, but what's happened here is that the companies involved have made a commitment to permit you to delete your data from the service. (Which they may or may not properly make good on, I'm not clear on whether they can be legally held to this commitment, e.g. in the US, once it's been made.)

A right to delete would mean something more like that the companies have no choice, e.g. that existing laws force them to delete your data from the service, whether they were willing to commit to offering that option or not.