Would you say that's a small percent of your user base? Most of my friends hate the idea of needing to login via Facebook, but it is truly the simplest for them

Would you say that's a small percent of your user base? Most of my friends hate the idea of needing to login via Facebook, but it is truly the simplest for them - and I'm not sure if my friends are just disproportionately biased. I'm also not sure if I want to depend on a third party.