I think the image is tricky, but for example lower right and in top row #3 from the right shows black far into the secondaries.
Niels
I agree the image is tricky, but some of the birds, for example the one in the upper left, but others as well, clearly show no black on the secondaries, which American White Pelican should always have. I will admit I do not know the full molts sequence of Northern Gannets, but I believe third year gannets have black secondaries with a largely white back and forewing.