By "hands down" I think you're implying that they should be better than Maryland by a very wide margin. They aren't better by a large margin, but they are better by a smaller distinguishable margin and if you ask a group of experts you'd get a near unanimous consensus that Duke is better. They've got a better resume than Maryland and their team's makeup is built for tournament success: good perimeter defense, balanced scoring, experience, very good free throw shooting and low turnover rate. Their weakness is defensive rebounding and 2pt. fg % defense, but the top seeds in their bracket aren't physical enough to make it a glaring disadvantage.
Duke is better than Maryland, I completely agree. Maryland is also very overrated in this year's Tournament. I just look at who Louisville has played and kept it tight with and compare that to Duke who has flourished in a weak ACC this year and I wouldn't think that Duke is in the top 3 or 5 teams in the Country for that matter.