I would like to share my timeline for LMO, might be useful for you:
NOC 1231
LMO applied: May 25, 2012
Received: June 01, 2012
Employer got a call asking some more docs: September 04, 2012
Add. docs submitted: September 06, 2012
POSITIVE LMO received: September 12, 2012
Good luck.
Cheers !!!