The powerful duo especially dominated in the longer races, over 500m and 1000m.
The friendly rivalry between the two sets of fans - many of whom arrived at Eton Dorney with drums and vuvuzelas to cheer on their athletes - was one of the defining features of the week at the lake.
Carrington started out as a beach lifeguard and was by far the quickest over 200m at Eton Dorney in the final.
Douchev-Janics, 30, was left so deflated she questioned afterwards whether she would go for gold in four years time.
The rivalry between canoeists and rowers - who did not perform as well for the country at London 2012 - was not lost on them. 'I'd take one gold over five silvers any day,' quipped Smith.
Perhaps the last word should go to a veteran athlete. At 47, the Italian Josefa Idem arrived in London to compete in her eighth Olympic Games.
And the one-time Olympic champion nearly won a medal after making the final of the women's K1 500m.
The mother-of-two has even pledged to go to Rio 2016 - as a journalist.