informed opinion.i was informed by another friend working that morning , that the pm arrived during an extremely busy period associated with typical south side lack of stands.his a/c rolled to block81 and would normally vacate to the south for the royal suite.however several a/c were already insitu just off the runway awaiting the xsanadu of an available stand.to follow them would have meant further delay and consequently he was instructed to vacate right to expedite his arrival to the rs.in summary , he got there as quick as possible but more importantly as quickly as he deserved.