I'm on day 34 (I think) and I've yet to recieve my first 6*.. although I've never really Gacha'd hoping for one. I just thought of 6* girls to be something I'd get "way later" in the game, but now I'm starting to feel like it's about time for my first..!
Come to think of it, I only have 4x 5* girls.. I've been so proud of my progress, leveling everyone up, evolving them, and it just hit me that they're all 4*.. They're all replacable. x.x