There's a very small step between "I don't like it, but women do" and "I don't like it, women do, so women like bad writing". Some people seem to have taken it, and are likening "girly" to "bad".

I have a feeling that this sort of thing is just very lazy criticism. They go "I dont like it, but somebody is buying this stuff" and then just say "it must be 'for' women." without thinking through what that means.
Of course, if this is all it is and the charge of sexism is levelled at them, they are likely to get defensive and use poor logic to defend a position they don't actually support.
I dont think Pat should have used that language in his website review, having known that people were questioning his terminology.

I'd hope that most people saying this sort of thing don't actually think that "girly" equals "bad", but as I say it's lazy thinking. And maybe this leads to such invalid conclusions being drawn (though I hope this isn't so).