I find the definition of long/short haul somewhat misleading. It takes 6 to 7 hours to get to JFK (that's long haul). It takes 5+ to get to Cyprus, an hour to turn round and 5+ to get back and that's short haul! This used to puzzle me as we struggled to keep our eyes open at 0400 somewhere over Austria or Hungary. In the end we (in our particular airline) decided to take power naps on the grounds that they were preferable to involuntary microsleeps on the approach. Boy did it work. 20 minutes kip was worth an extra 3 hours alert consciousness. It was a wonderful feeling. I am very glad that it now seems to have a degree of formal sanction. I cannot recommend the technique strongly enough.