I agree with you. I think there are a lot more 4b's out there that are misdiagnosing their curls thinking they are 4a. To this day, I don't what I am. I actually cant tell the difference between 4a/4b. It all seems the same to me. On some days I have no curl, and on other days I have tightly coiled lil springy curls. But for the most part you can't "see" my curls from far away. You would have to be really close up on my hair.
I also think that a lot of 4b's chemically treat and alter their hair to a 4a state and that's also why they are claiming 4a/3c...You all are definitely right about not seeing a lot of 4b's because they are most likely to relax.
I have noticed with my hair, when I first went natural, I didn't have any curl pattern at all. Then as I started DC and Co-washing I had more curls. That's when I was like maybe I am 4a...But still I don't think it's much of a different.
PS-I'm not a big fan of Miss Jessies products anymore either. They are so heavy and just make my hair feel dirty and dry. Not a good combo