http://finance.yahoo.com/echarts?s=MCD+Interactive#{"compari...
Part of the difference is experience: your typical American major-city McDonald's is ill-maintained and staffed by unpleasant people, the food being terribad is just the icing on the shitcake and given how few fucks seem to be given about service quality or cleanliness, the chances it'll give you salmonella are probably much higher. Quite different from the magical wonderland where hamburgers grow on trees we were sold on by the 1980s television commercials.
In Japan, cute 20-something girls take your order and serve your food with a little Handi-Wipe to clean up with after you're done. The restaurant is spotless and though a Japanese Big Mac tastes identical to an American Big Mac, you don't feel like it will give you food poisoning. From my limited experience with Australian McD's it's much the same and they turn into trendy little hangout spots.
And consequently that implies people believe the expectations of Wall Street are wrong, or at least not in line with what the majority of people believe is right. I think that's probably true.
Any "strong performance" may only be a result of the stock buyback -- which serves to inflate share prices by creating demand for the stock not by virtue of the value of the business, but by promising to extract further value from the business and give it to stock holders via dividends and buybacks. Quoting the article:
>"...its executives can do up to $8.1 billion in buybacks in 2015..." and "...to help finance the plan...[McDonald's would] take on more debt..."
As noted in the article, they paid out 134% of net income in 2014 -- so it's probably not the strength of the business that's driving demand.