Do girls judge a guy by the first kiss?

No - the guy is judged way before the first kiss, even the first date and often before the first real conversation!

If the first kiss is bad though, there will be some doubt on her part on if she wants to teach you how to kiss her like she wants to be kissed.

Be open to learning and don't take anything too personal (unless the girl you are kissing is a jerk to you or just mean and rude). Learn what you can from her cause each girl is different!

By the way, rude and overly judgemental girls who want to change everything about you - say goodbye. If she doesn't like you for who you are and wants to change everything about you - you will NEVER please her.

I do. Not in a bad way. But, during the first kiss you can tell how you feel about someone. A lot of times it can be confusing as to if you like someone as more than friends. I can usually tell if I do by the kiss. If I really care about them and am attracted to them, then I will feel more in the kiss. If its just friends feelings then the kiss isn't as enjoyable.

So its not really that I'm judging the kissing ability, just the fireworks or lack of.

Haha that other girl is right, the guy has probably been judged by us way before that.
If I already like him, then I may overlook it and just think he needs practice
If I already don't like him, then that would probably just be another reason for it
It's not exactly fair, but it's not a conscious thing for me :s

Yes to an extent. I find though that kissing is so much better just from getting to know someone better. But the kiss is so important. It tells about the chemistry.so I would wonder if I was really into the guy if the kiss was bad.

That may be true of some women but it isn't true of me! Nerves and many other factors can get in the way. plus if you like the guy you can teach each other what you like.