Of their 60 Minute IPA, Dogfish Head says:

Our flagship beer. A session India Pale Ale brewed with Warrior, Amarillo & ‘Mystery Hop X.’ A powerful East Coast I.P.A. with a lot of citrusy hop character. THE session beer for beer geeks like us!

At 6% alcohol by volume, I’d debate their claim of a session beer, even for beer geeks. At any rate, it’s an enjoyable beer. I believe they call it "60 Minute" because they continually add hops to the beer during the boil (which is, naturally, 60 minutes long). I’m not sure if this is right or not, but it certainly sounds good.

Appearance: Clear straw orange—copper gold. Nice thick tall bone-white head.

Smell: Clean and hoppy—a bit light. A hint of mustiness. Sweetish malt. Something in it reminds me of pollen-powdery hops on the vine…

Taste: Strong hops—spicy, a bit grassy, no citrus/grapefruit that has become popular of hoppy IPAs of late. Alcohol strength—tastes like it should be stronger than 6%. Malt is crisp and wheaty… lightly toasted grain with a biscuit sweetness.

Mouthfeel: Lighter than I’d expect… hop oils spread around the mouth—a bit of a bite.

On BeerAdvocate, it scores 88 out of 100, with 99% approval. On RateBeer, it scores 3.78 out of 5, and is in their 95th percentile.