Didn't check the dates.... my bad. I was actually doing a google search and got kicked back to BYC. So it may still help someone. How did you find it? Are you the one who still uses the site?
I have heard from some "old timers" that the best way to sex them prior to 6-8 weeks of age is the eggs. The point on the egg gives it away from what I hear. I think a blunt point is a female while the pointy eggs will be male.... and the ones in between can go either way. Not sure how accurate...