I was curious about why so many people were getting the same result, so I tried a bunch of different combinations of the 4 questions (not that there are that many combos, with only 2 questions each). It seems like really the only question that makes a difference is the last one. You can select any combination of answers for the first 3, but if you select "Go on a walk" for the last you apparently fall in love quickly. If you, instead, select "Go to the movies" for the fourth question, you fall in love slowly.
Seems like most people here would prefer to go on a walk than to go to the movies after dinner with a date. : )