Does sibling’s gender and a birth order reveal your own personality?

I’ve been talking with this man and we are going to meet on Saturday,

the other day he mentioned he thinks I am an older sister of a brother, he knew I had a sibling but didn’t know if I had an older sibling or a younger sibling.

I was surprised he guessed I have a younger brother and asked how he guessed:

He said that’s because I am very hard-working, so he thinks I always felt the responsibility to help the family as an older sibling, he thinks that I have a brother because I easily understand a man and I am nice and caring to them, so I must have a brother, most likely a younger one. Not an olde brother, cause he thought I would be less hard-working and would have a more relaxed lifestyle if I had an older brother. That’s why he thought I was an older sibling.

And when I asked how did he know I didn’t have a younger sister, he said that’s just his intuition, he guessed I don’t have a sister but a brother.

Is it so easy to decipher that from the short interactions we’ve had?

Does sibling’s gender and a birth order reveal your own personality?
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