I have exactly the same experience with Delta 3200. In my case, I exposed it at 3200 and processed it using figure between 3200 and 6400. It came out very thin.

That said.... the negative printed incredibly well. No special treatment was necessary. I used normal contrast filter and did my normal stuff. The exposure time was short, of course, but nothing special. Why don't you just try printing the way you normally do? If that doesn't work for some reason, then go to plan-B.... You might be pleasantly surprised.... I was!