It's been Heath Ledger that's been getting much of the attention for Brokeback Mountain, but in this film critic's humble opinion, Gyllenhaal was just as good, if not better, although, admittedly, both performances wouldn't have been anywhere near as good without each other. His commitment to his role is both noticeable and notable, and very, very brilliant. The character of Jack Twist was a harder task, having to do much of the leading (and succeeds too, as shown, in the sizzling scenes with Ledger), and Gyllenhaal rose to the task commendably. He is everything Jack ought to be, tender, sad, doe-eyed, and hopeful. Gyllenhaal is all of those things, and, with added vivacity and charm. His sweetness is the key factor in Brokeback's heartbreak, and for that, as well as such a fabulous performance, built on nuance, Gyllenhaal should be duly awarded.