I know, I was shocked when I realized that my Silkie was the first crower in the flock of 11. I have 5 definite EE roosters, that are a lot more masculine, but they just now, this week, have joined the crowing choir. ;-)
It took me a week to actually see him in an act, and the sound he makes is quite different then EE roosters. Now, when I have a bunch of crowers, I can tell when the Silkie is crowing vs. one of the EEs. ;-)