When my ground school started back in March, they told us we'd start IOE within a week of the checkride. Right before going to the sims, they told us the line check airmen were backed up and it'd be at least 2 weeks before we'd start IOE. After my checkride, I actually waited 3 weeks before my first IOE trip, and I was one of the first guys in my class to begin. I'm not sure what the current wait time for IOE is, but I wouldn't be surprised if it's up to a month to 5 weeks. That wait time will start coming down now that they have slowed down the hiring.