Can a woman change her mind about attraction?

Thanks dirtybirdy. I liked your response. I have had the tendency alot to think that whenever a woman sees me and doesn't right away seem to care for what she sees (unattractive), that she will then never change her mind what she thinks of me, no matter how cool, confident, etc. I am. But your response gave me a little hope that just because it's not great at first doesn't automatically mean it will stay that way no matter what.

Other people and websites I've read have said things such as "a woman will always know within the first 30 seconds of seeing you if she'll ever want to sleep with you or not". If that's true, then there will never, ever be any hope of a relationship and compatability no matter how well you play your cards just because she didn't find you attractive at first. My sister did say that her husband now, when she first saw him, she did not find him attractive, but they fell for each other due to them fitting so well together on so many other levels. Then again, there are those people who still say "a woman will always know within first 30 seconds..." that I wrote further up. The shallow women I know think that way. I'm just curious what percentage of women today in 2017 will not automatically write a guy off at first look due to attractiveness levels alone.