In all of my flying, regardless of the carrier's origin, no one's prayer has ever made enough of an impression on my that I remember it. This includes flights on Emirates, Qatar, Gulf, Royal Jordanian, Saudia, and Turkish. I do recall seeing some people come out of the dedicated prayer room on a Saudia 777. The Middle Eastern carriers generally include a prayer played on the video system prior to the safety video and indicate the direction of Makkah on the flight map. I don't recall either of these on Turkish.