This sounds like a softball question to invite you to talk about your projects phrased in a slightly ignorant way, possibly on purpose. If you had quality projects on your GitHub this should be an extremely easy statement to answer with "I disagree because x and I'm particularly proud of y and its popularity with n users and feel that it demonstrates skills z". It's a perfectly fine way get a chance to state the value you demonstrate on your GitHub. I'd have no problem with getting this.