I had to use JavaScript find each element and the hide the export button.
see here
http://techtrainingnotes.blogspot.in/2008/02/sharepoint-hiding-menus-not-using.html[
^]
I just added
var doc = document.getElementsByTagName('ie:menuitem');
for (var i = 0; i < doc.length; i++)
{
itm = doc[i];
if (itm.id.match('ExportToSpreadsheet')!=null)
{ itm.hidden=true; }
}
oh ... and you need to add this below the
</WebPartPages:WebPartZone>
in the view
Modify the view in SharePoint Designer in advanced mode
Update:
This works for anything in SharePoint not only (surveys or lists)