David,
The player still has the right to wait the ten seconds. The closest decision is
16-2/2 Ball Overhanging Hole Knocked Away by Opponent Before Player Determines Status
Q. In a match between A and B, A putts and his ball apparently comes to rest, but is overhanging the hole. Within five seconds, B concedes A's next stroke and knocks his ball away. Was B entitled to knock A's ball away?
A. No. Under Rule 16-2, A is allowed a reasonable time to reach the hole and an additional ten seconds to determine whether his ball is at rest. Since B infringed A's rights, in equity (Rule 1-4), B lost the hole, assuming that A's putt was not for a half, in which case Rule 2-2 (Halved Hole) would apply.