Update... Willie is doing well! A respectful young man who keeps his distance so far. I'm not sure if it is his breed, or what, but the way he runs cracks me up! I can't even explain it!
I have the same questions about my 5 wk old SLW chick-thinking it may be a cockerel. The comb is and has been quite pink for the age and it seems to have more white over the wings. I'll try to get a good picture of this chick.