Here's the blue confirmation of the above.
It's a good thing. This means you can actually farm the Act you enjoy most (or take a breather from an act that's gotten stale) and still see the same amount/quality of loot.Nailed it. There will be still be some differences between the Inferno acts (due to the way the monsters are designed), but it's really up to your personal play style right now. If you feel more comfortable farming Act 1, do that. If you like the flow and pace of Act III better, then spend your time there. Since monsters in each act will share the same drop tables in Inferno at MP1 and higher, the idea is for you to play where you want without having to worry explicitly about which monsters drop what and how often. Some acts might be more efficient for you in the end, but that's really for you to decide.