Female writing patterns in informal contexts

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Females tend to write in a rather unique way when in informal situations. However, I have noticed that these characteristics might obscure the individuality to some extent.
To confirm this hypothesis, I tried a couple of female-centred spaces. To my surprise, any individuality beyond emotional one is almost indistinguishable there (results are magnified). Instead of operating in patterns like males do, they operate in cycles.
Any scientific explanations for this?
My best guess is that I'm commiting some logical error/sample is too small (cc, /soc/, reddit)