A rooster could crow whether or not it had wattles, however I'm not seeing the the long pointed saddle, hackle, and sickle feathers on this bird that would make me think it's a cockerel (but then my eyes aren't what they used to be either). 

) The tail feathers look nice and rounded to me like those of a pullet, and the redness of the comb can be explained by the age of the bird (close to laying). However, no one at BYC is inerrant and sometimes their is a bird posted on here that know one knows for sure until they actually crow or lay an egg. In this case, I'm sure that the crowing is making members think that it is a cockerel, and it may yet turn out to be. It is highly unlikely that a pullet that young would crow.