Have flown DL exclusively internationally, 4-5 times a year for the past 10 or so years. Until the last few years, I was allowed to park a computer bag on the floor in front of my BE seat. In the past couple of years, it has been hit or miss, though it is true that more recently there has been more focus on having nothing on the floor. So it seems that procedures differ and thus experiences for experienced international travelers differ as well.