Every election cycle the democrats haul out this completely irrelevant piece of news. What is really suspect is how many of these countries are governed by right of centre parties, leading one to conclude that if mitt Romney was the leader of their own country's right wing party he would be faring much better in these "polls". Even here in Alberta Obama gets 46% of the vote to romney's 19% and we have had conservatives in power here since 1971 & by large margins too (even our official opposition here is conservative). Doesn't make any sense.
This really only goes back to the George W. Bush years. George H. Bush probably would have won a worldwide vote in 1988, and almost certainly would have in 1992.