Most Helpful Guy
While I might occasionally NOTICE something like that, it would be less important to me than, say, the number of her Brownie troop or what her cousin ate for breakfast last Thursday. Stuff happens in life, and I don't have time to worry about that level of minutia.
If I noticed her nails, I would be thinking "Oh, look, she did her nails. She's trying to look nice; that's sweet." And that would be as far as it went.