Don't get me wrong, I've read Blizzard's announcment on patch 1.0.3, and this post as well Which parts of Inferno Act 1 actually drop ilvl 63 items?.
What I want to ask is that, do you get a rarer drop versus elites/champions for bosses? Because I have 220% magic find and I'm actually getting more rare drops from elites/champions (1 - 3) than a boss fight alone (1), and if there isn't any difference, I might as well start hunting for elites/champs than farming all the way to a boss in Inferno.