Most definitely dude. I don't watch much of the Seahawks but he did it at USC with Cushing being the hybrid rusher, at that stage I didn't really know much about his D though.
A couple of years ago I read that Nike clinic presentation he did, at least I think it was a Nike clinic because he thanks them, and I immediately thought, wow this is very close to a 3-4. They just have a 3 tech and the NT doesn't always play over the nose. Rex Ryan & Co are very hybrid as well, they play a 46 D with 3 defensive linemen.
I'm sure you've read enough about Carroll's D.
Here it is for anyone that's interested.
All you have to do is watch the first 2 or 3 minutes of that first blitz video, and even with the shit quality you can see how it mimics a 3-4. Double OLB blitzes, but the OLB is a two point stance DE. In another clip you have Cushing right over the TE in a press man look and then he comes rushing in and it's only a 4 man rush. It's good stuff.
His D has the potential to be pretty dangerous, there's a certain violence about it, lots of speed, pin your ears back and go.
