Not sure about the wait between interview and training, but here are some actual dates from the Sept. 22 CRJ initial class. These dates only reflect the experiences of about 10 of us from that class.

Sept 22 Indoc begins
Sept. 30 Indoc exam
Oct. 1 Systems begins
Oct. 16 Systems exam ("validation")
FTD/ sims: Some guys started FTD on Oct. 17. Others, such as myself, had a long break and wound up with this schedule:

Dec. 3 FTD starts
Dec. 9 PV (procedures validation)
Dec. 17 MV (maneuvers validation)
Dec. 18 KV (knowledge validation)
Dec. 20 LOE

Dec 29 IOE Day 1 (yes, that's tomorrow. Wish me luck)