Interns rotate through are doors like nobodies business, which makes me wonder where all our ETLS are going. I hear all the time how that intern everyone loved so much quit 3 months after starting in their store.
I think people hired from outside have less chance of making it. People who have worked their way up through spot usually know exactly what they're in for by the time they get there.
The 18 month guideline is a running joke in our store. Our Log is going on 15 years, 5 in our store. Our Repl is going on 15 years, 5 in our store. Our HL is at least 5 years in position. Our food Etl's kinda rotate between starbucks/food ave and dry grocery, but never venture into other areas. GE and AP are the ones that move a lot. We rotate SL a lot too. I guess its about half and half.