In Orlando I had a problem with waking up very early (like ~4:00) but on return flight I slept for most of flight so in Frankfurt it was early morning for me and I was not sleepy. Next days were also fine.
But this time it is other way ;( In Dallas I also was waking up early but after drinking some water I was able to get back to sleep. Return flight was disaster… There were few small children crying for most of time and I forgot to take ear plugs ;(
Yesterday I nearly felt to keyboard after 15:00, today I am yawning since about same time… Argh you jetlag!