Looking at comb development and posture this one could be a male. I can't see how heavy the legs are with those feathered feet. It is still too early to tell for sure. You might post more photos at 5 weeks. A photo showing a close-up of the head so we can see comb and wattles (if any) and a different photo showing posture and proportions.
Again, comb and posture has me leaning male but the legs do not look heavy. Still too early to be sure. More photos later please.
I don't put any faith in how fast feathers grow. At that age that is controlled by genetics, not sex. In another two or three months the saddle and hackle feathers can be pretty definitive but you are a long way away from that. That myth comes from when you breed a fast-feathering male to a slow-feathering female the girl chicks will feather out faster than the boys. Unless you know that the parents are genetically set up that way do not put any faith in how fast they feather out.
Cockerels tend to be bolder and more curious than females. This could be an indication that one might be a male. But each one has its own personality. Some girls can be pretty forward while some boys can be downright shy. To me this is an indication "maybe", but do not draw any definite conclusion from this. You could easily be wrong.