LOL!! I can relate, it's one of my favorite sounds, hands down. And we've been very impressed with our Dorkings as well. Although, they've gotten more aggressive than I would like at this point (nearing 16 weeks) but we have too many roos. So, I think that's more the issue than an excessive...
Oh yeah, Duke's working it out!! Wait until he actually starts making a sound, it'll be ROUGH! My SG Dorkings took forever to ge the raspy, gravelly, choking sound down to an actually decent sounding crow. But, they're crow is pretty involved compared to some other rooster types I've had. Glad...