It was 13 days for me from checkride to observation. I'm glad they went back to only 4 legs, instead of 8, 'cause the CRJ jumpseat is uncomfortable as hell. It should only be a week or less after observation for IOE. BTW, I wouldn't count on Flight Standards to call you. I would check SBS on a daily basis, cause they never called me and I'm glad I checked. Also, if you are doing observations or IOE out of CVG, they will have to provide you with a lodging (if you are JFK based)!