Well that's my point - since most people here are male, failing any other clue, a person could assume everybody is male and not be proven wrong.
For what it's worth, of the examples you listed: I am not posting under a pseudonym, it's my real name (trivially googlable) and not at all gender-neutral in my culture - and personally I don't think Dan Delany is that gender neutral :-)
No one knows if your name represents you though - I could be "redbloodedmale17" and still be a 40 year old woman. I thought dandelany was from "dandelion", possibly feminine, even if it is Dan Delaney then Dan could be for Danielle (f), Daniel (m), Danika (f), Dante (m), ... on the internetz know one knows your a dog.
For what it's worth, of the examples you listed: I am not posting under a pseudonym, it's my real name (trivially googlable) and not at all gender-neutral in my culture - and personally I don't think Dan Delany is that gender neutral :-)