Lots of late hops. I brew an IPA with 1/2 lb of pellet hops per 5gal batch. I prefer simcoe:
If you eliminated that 35min addition it would be pretty low IBU's. I actually shift that 35min addition +/- 5mins to adjust for AA% and get the correct IBU's. As far as the difference between dry and flameout hops, both contribute strongly to the aroma and somewhat to the flavor, but the aromas and flavors will be slightly different. Dry hops can give more grassy/raw hop flavor IMO.