Let's see... I had about a 3 month delay between check in and API. Part of that was IFS, part of it I was waiting on a waiver, another part just stashed.
One week between API and primary. No wait for intermediate. About 10 days before advanced. Then the big 3 week off during Ivan. And that's about it.
Biggest delays are when you're in phase and constantly incompleting/cancelling for weather... or just 'not scheduled'... or if you down an event and hafta wait on the walk of shame...