Just my opinion, but considering comb/wattles, I say boy. Feathering is no real help in this breed until later. Legs are a bit petite, but head shape and glowing red comb tells me boy. Even in the blurry pic, you can see how developed his wattles are. Fingers crossed for you, my gut says boy.
Thanks so much!! I've been thinking boy since he was about 8 weeks old, and I was really thinking I would know by now. When do their hackle and saddle feathers start to come in? It looks like he might be starting to get his hackles...but I'm not sure. And I noticed some pointy feathers in the saddle/tail area, but they're too small to tell yet.