I'm not sure if the runway length at Samos or the testing approach onto its easterly runway have anything to do with a tail strike on take off (which I presume this to be?).When they still had them, XL flew their 757's direct to MAN from SMI with few runway performance problems.
Samos becomes a real pain to operate into and out of,when there are strong north to north westerly winds.Such crosswind and terrain induced rough conditions might cause two reasons for a tailstrike on take off.The crosswind might tempt the pilot to rotate too quickly,egged on by a feeling of wanting to get away from the ground cleanly before skid/drift and associated possible wing drop/roll needs sorting out.Or, the pilot might rotate at the correct rate,commenced at the correct speed but then be unlucky with a windshear due to the rough air.
But who knows. It could have been a quiet, calm day but the achieved rotation rate a little over enthusiastic. And that can happen anywhere.