It's not easy to change so quickly. I'm dissatisfied with Google since years, but changing away from GMail requires me to change dozens of registrations. Oh and GDoc, I have tons of documents there, both and shared and private, not an easy task to migrate that away.

Same with Facebook, it takes ages. I don't care so much about them but others do. With time people changed real names to Pseudonyms, deinstalled the App etc.