Needless to say, we had no problems getting through a workday on the new MBP -- we generally juggle Firefox, Chrome, email, a couple chat clients, and various image and video editing tasks on and off throughout a day, and things never felt sluggish or laggy at all. Used this way, we also managed to get around seven hours of battery life, which is pretty impressive -- we imagine things would have dipped had we fired up the Radeon more often, but in day-to-day usage the Intel graphics did just fine.
And fair kudos to Apple: with the MacBook Air, the company switched to a new battery test that automates browsing popular sites over WiFi at standard brightness, which generates a more accurate number, but also means the new MBP actually is rated lower than the outgoing model using the same battery. That's a solidly consumer-friendly move, and one we definitely wish more PC manufacturers would make as well.