I've seen WBC with over 4" of sapwood which is a creamy color. It all depends on the growing conditions. Trees grown out in the open, like a yard tree grow much faster and put on more sapwood, than those grown under a deep woods canopy.
In freshly planed cherry the sap wood provides a beautiful creamy white contrast to the heart wood. Unfortunately I have never been able to capture this difference in a finished piece. I think it turns more muddy with age. Maybe I just haven't hit on the right finishing schedule...
Salem
There is a little sapwood in the legs of this chest, bit not in the frame components. It's not overly powerful in appearance in this case. The finish is clear dewaxed shellac and Waterlox "Original" Sealer/Finish.
Here is a project with some sapwood in it too: http://ncwoodworker.net/forums/showthread.php?t=33320
I loved how it looked freshly planed. It still looks pretty good but in this case the sapwood turned more yellow with age as the heartwood darkened. I definitely preferred the creamy white.
Salem
I think the sapwood of cherry and maple look very similar. I have one board that has yellow colored sapwood. But my other examples have stayed white. The contrast between the heartwood and sapwood increases as the heartwood darkens due to exposure to sunlight. The sapwood of cherry and walnut are also about the same color - but the walnut grain is semi-porus (of course).