It took my husband 7 years and 3 appeals to get his disability. My mother in law got her's in 8 months. My brother applied got denied then was approved within 3 months on his appeal. So it really is a crapshoot as far as I can tell.

We also found out the hard way that you have to have worked five out of the last ten years to be approved for SSDI otherwise you only get SSI. So apply as soon as you can and get the ball rolling.