Japan looks oddly crowded on the map, more cities than there ought to be. There's less farmland than you'd expect, and out of curiosity, you follow that thread of thought. It looks like hydroponics cultivation is far more commonplace than you remember, which would explain how the country supplies itself. Japan's a net exporter of high-tech goods, as expected.
You follow that thread of thought, searching for a world map. Arab Spring happened -is happening- and you know that it started with the Tusinian Revolution. It happened, and things spun out of control, as you remember.
The world doesn't look too different. There are more people, and more events, than you remember, but the broad strokes remain. The major countries all exist with the more or less the same borders from your memory, though you're not quite sure about the Caucasus region.
Which is... strange. Shouldn't the effect of magical girls be more potent? More visible? You'd almost have expected extra wars, or perhaps a lack thereof from the effect of Wishes. But then...
You know Cleopatra was a magical girl - in and of itself strange, but she was one of the magical girls Madokami collected. And you know Jeanne d'Arc was a magical girl, too. There must, then, have been some degree of convergence to history, perhaps the effect of the Incubators concealing things and smoothing out the bigger ripples.
It doesn't fully make sense, and you suspect only one being would give you the kind of answers you want on that, but talking to Kyuubey about another world you remember? You've seen what lies down that path.
... well, maybe two beings. Madokami might know, but you can't exactly talk to her. Maybe she'd answer prayers from you?
Hmm. You don't see anything major that might trip you up. The Olympics still happen, the Allies still won the Second World War and precipitated right into the Cold war, but were still responsible for Japan's post-war economic boom. China's Great Leap Forward happened... essentially as expected.