Surprisingly, plants can vary in size and shape even if they're the same strain. Another point is that the seeds that people buy may or may not have come from the same female plant. So that's why one plant might not do as good as each other.

I wouldn't rip her out, as I've heard that up to 25% of the bud growth comes in the last two weeks of flowering cycle.

Keep us posted, I'm interested to see if she pulls it out in the end!