i filed my i140 , EAD,i485 concurrently on 30th august.
i got my i140 approved on oct 23 and my EAD approved on Oct 24.
I have been following a lot of posts regarding concurrent filing , and the one striking pattern is that EAD is issued only when the i140 is approved. However , it still works out to ur advantage since i140 is being approved pretty early these days , and as soon as it is approved , the EAD is approved within a weeks time.
Please note that i have been following mostly the pattern at NSC and this may not hold true for the other centres.
Good luck and cheers,