Actually....
There have now been four guys that interviewed within 2 weeks of when I did (Early May). All four of them called EK because they had second job offers.
All four of them were offered jobs pretty much on the spot. Three of the four had their refs checked right after their interviews, not sure on the fourth...
One ended up having some paperwork issues and frankly, was lucky he called!
So if you have a second offer from someone and are considering taking it, call EK and let them know that you may become unavailable soon. No harm in doing that....
I still haven't heard a thing except the sound of my references emailing forms in the wind.... ;0)