Frank, your method is close and a lot more controllable than the Warp feature.
You can see that the edges still deform (the process is still X-Y "linear" rather than spherical).
In this case, I use a 10" disk, .1" thick wrapped on a 5" spherical radius. At the tighter bend, the difference becomes more notable. You can see the variation beyond the revolved cut.
However, with the revolved cut, you can definitely get this part a lot closer than the Warp feature does with a whole lot more control.
Creo 2.0 full versioin attached.
