in my opinion it means that the woman imidiately felt attraction toward him (her attraction to him is immediate,) but the feelings of the man toward the woman are not as clear/strong as hers (but his feelings for her are less apparent.)

I think what it means is; the girl has seen the guy and immediately falls for him. He likes her too, but might not be aware of it. If he is, then he's not showing it much.

很高兴结识你，je suis heureux de vous connaitre

Statement still too general to come up with a concrete conclusion. One way to interpret it is that the she has stronger feelings for him then he does for her.

I think it means the girl is immediately attracted to the guy. It is obvious she is because she may have shown her interest/affection towards him in some way or another. However, he may or may not be attracted to her. It is difficult to determine if he is or not because his feelings towards her are less obvious.