My OEGB has a very loud crow, but some of my other guys are pretty loud. I have one BLR and and a NN that are fairly loud. Oddly, even though my Jerseys have a very deep crow, their crows aren't that loud.
Right now my standard Orp crows as loud as my bantam Brahma *haha* No, honestly I'm not sure if its really the Orp, its a new crow from the flock. But my neighbor has an OEG and it is LOUD! Its not a soft comforting crow, either, its very shrill.
I would say standards, mine does. Both my bantams hav "broken" crows, thats what the kids call it. They can't get the crow to "roll" correctly. Its the funniest noise I've ever heard.