Board Thread:Questions and Answers/@comment-33011666-20180319101239/@comment-32271305-20180319122201

It doesn't make any difference, but with five at a time the process is quicker, and you also see it working more often. I think it's better to get 2 out of five, rather than a 0, another 0, a +1, a 0, a +1 and another 0, even though the result is exactly the same.