Daz, I think you may be a little bit off course here , unless my reading comprehension just blows

. I think what BK is saying is the way you phrased your original " thought" is misleading for what your ACTUALLY trying to say. I see you went from talking about "success rates" to these programs not affecting ones "success". First off, success rates and success in general are like PPG( Points Per Game) and actual wins and losses in basketball. Your points per game could be low as hell and you still win the game or you could have a really high points per game and still lose the game.
Haha, sorry for the metaphor, but success rates are simply the % of which the sites your software tries to post a link too actually come through. The general success of a person in Internet Marketing is dependent on sooo many factors , certainly not just your link building software. Although, one could have the prettiest , best looking, most informative web site in the world and if it cannot be found then its just that, a pretty, good looking group of words that no one ever knows about. Sorta like if a tree falls in the woods does it still make a noise?
But more directly answering what I think you mean and what I gather is the "success rate" of people that attempt Internet Marketing is not directly affected by the software they use to build links is true and sort of untrue at the same time. Although link building itself solely could not determine if your going to be successful or not in Internet Marketing ; if you learned to master one of the many link building software programs one would have a much better shot at being successful , of course, that is, IF ranking websites was what the IMer was looking to accomplish to rake in the cash. Now, to the question of does it matter WHICH software you use, and I guess that is up for debate because there are so many different opinons on whats the best link building software out there, and in my opinion, what the boils down to is what works for you. Which one are you going to put the time into and learn the small things that make you successful.
Maybe I am the one that's way off pace here, I don't know, all I do know is I hope I cleared the air here a little bit, at least for someone!
Tim