use a for loop:
select your objects in the outliner then run this

global proc changeSmoothing(int $res)
{
pickWalk -d down;
string $objArray[] = `ls -sl`;
for($obj in $objArray)
{
string $conns[] = `listConnections $obj`;
for($conn in $conns)
{
if(`match "polySmoothFace" $conn` != "")
{
setAttr ($conn + ".divisions") $res;
}
}
}
}

changeSmoothing(1);

Change the number in the parametres that will be your smoothing level.

That should do it.


Alan