If Romney hits 47.49 percent, his totals will round down to 47 percent. It doesn't matter of course, but it would be delicious irony to see him finish the election at that very famous 47 percent mark. And in a year full of fun outcomes (like Allen West conceding today), why not squeeze one more?
So thanks, Maryland, for getting us that much closer. With huge chunks of California and New York still outstanding, it would be surprising if the final rounded results aren't 51-47. (Note, only 10 states have completely finished their counts.)