The problem that arises out of comparing Aikido to other martial arts is that Aikido exists in the absolute world while other arts deal with the relative world. This is not to say that everyone is in the place of no contest: the absolute, but OSensei pointed the way through his practice and his character and gave the art direction. It seems that everyone these days is worrying about Aikidos effectiveness or how it will do against this art or that art. Let me give an example of Aikido trainings "effectiveness" from my own experience.
http://www.aikiweb.com/spiritual/messisco1.html
