Thats probably true, but Bella seemed to think the reason she was so attached to Jacob while she was preggers with her muntant child, was down to the imprint thing working its magic. Which btw makes even less sense cause Jacob apparently had to see the damn thing to imprint on, but thats just further proof that we can't say 100% how the damn thing works.

I for one am super glad Leah didn't imprint on anybody, its just the stupidest concept to latch characters together for conveniance sake rather then have to develop a relationship.