I also agree with the GLW being a Roo. Both of mine didn't get those big of wattles till week 20-25
Here are mine at week 15 I started to think my lighter one was a Roo because her comb really started to grow at about 23 weeks and it scared me. 2 weeks later I got an egg.
And I don't know if its just me, but my pullets seemed more "poofy" than your GLW but Im not sure if that necessarily means that it is a roo. I know my girls had really thick feathers on their back and they showed no trace of pointy saddle feathers at all.
Compare the two laced wyandottes, I would put money on them BOTH being pullets.
You better be wanting lots of eggs! You obvioulsly had a good day from the sexers, I don't think that they are usually that accurate at sexing them, but you lucked out.
I call roo on the GLW also... The Americauna/Auracanas.... tough call... still could go either way... but I will really thing the GLW is very rooish... They don't develop combs and feathering till really late... I got tricked at the 6th month mark on one.