Pigeony
Songster
I'd say it's a sure thing personally. If it were my bird, I'd treat that one like it was definitely a rooster. Here's a picture (not mine, off the internet from a hatchery) for comparison: pullets/hens have much more neat and orderly feathers while the cockerels/roosters have more of a bedraggled punk rock look to them.
Sorry but that looks like a roo to m
Would you say it's a sure thing or try to give it more time?