Adrian:
I wish it was a promoter of the ground game, but in my experience, the aprons are usually a bit softer than greens and fairways.
Mark:
We have the same situation on our course and I but it down to the greens being sand based, but the aprons being more soil based. I assume the aprons get as much irrigation as the greens, so it must have something to do with the soil composition. On one our holes, you can feel yourself sinking as you walk through the apron. Balls get plugged in the apron or only bounce a foot or two. I don't imagine our greenkeeper aims for this condition, but with so many sprinkler heads around the green edges, it's inevitable.