EK is a great place.
As for American pilots, my info isn't all too accurate but I thought as of six months ago the only actual Yank was an ex USAirways pilot who finally had enough at USAIR and resigned, good move eh? Ex EK Yanks to include one or two ex Eastern, and two ex Saudia. There are a number of "US residents," read green card, and also a few US passport holders, ie dual nationality types. EK's pilot hires have about the highest qualifications that you could imagine. It's like a collage from all the airlines of the world. Very qualified, but not too many Yanks.
Hope this info helps. Good luck to you!