Buff orpington gender

[Rooster1918]

Looks like a hem

 

[pennypenny]

Do I have any reason to believe this 17 week old could be a roo?

I know this is an old post, but I am reading up on early maturing BOs and came across this. I have a 5 week old BO who has a huge and red comb and wattles compared to my other 5 girls, but just doesn't act "roostery" to me. I have 6 different breeds which makes comparing the chicks to each other tough.
This is my first flock so I am really just going off of gut feelings. Do you have any pics of your girl at 5 weeks that I can compare to? Nugget is my middle daughter's baby, and I have started preparing her for what seems inevitable, but is it too early to completely give up hope?
These pics were taken this past weekend (4.5 weeks old)