Well, I could run it through some software to verify, but the hop rate looks pretty modest on that considering it's an 11-gal batch. Depending on the gravity and boil volume (I assume all-grain here), you could get decent (low 30's?) but not massive IBU's out of the FWH. That would be quite low for an APA.
1 oz late is not enough, I'd say. I put half an ounce of homegrown cascades in at 15 min and another half ounce at 5 min on a light (1.051) APA-ish beer and got great hop aroma and flavor, but that was a 5-gal batch. Some of my friends were a little blown away by the hops, but after a couple sips they grooved on it pretty hard because the total IBU's were really modest (~35--1/2 oz Chinook, 1/2 oz Challenger @ 60 min).