the person indicating the concern has ever right to contact the airline and ask for an explanation.
chances are it will be a fine one showing good airmanship by the crew
there is an off chance that checking the FDR might show something amiss that the chief pilot would like to know about.
Barit1 has indicated one type of approach, and if properly done moves things along.
Having been based at both BOSTON and DCA, one can maneuver at relatively low altitudes in visual conditions to help ATC ...but one must be careful.
the normal approach to the southbound runway at DCA (formerly known as 18, now 19) is a kick with final maneuvering at low altitude.
I hope this person contacts the airline and he will probably get a letter of explanation.
I have never been annoyed at explaining something to a sincere passenger.
And sometimes landing with a 10 knot tail wind is safer than landing with a headwind...when the tailwind gives you an ILS and the headwind gives you an NDB. (runway length considerations of course)