theory11 — Magic Tricks & the World's Finest Playing Cards
I'm going to go out on a limb here and disagree. Magic doesn't need patter. Teller is a renowned magician, yet he doesn't speak. To make it more personal, I'm currently living in a with about 8 students, none of whom speak english as a first language and most of them only speak broken english. I've done magic for them, and rather than try and simplify my patter, I performed without. Reactions were still excellent.
In fact, if your patter sucks, it can detract substantially from your magic. It can add complexity where it shouldn't exist.
Granted, I realize patter is important and can contribute an enormous amount to magic. I just wouldn't go so far to say it is completely necessary.
Patter isn't just talking. The presentation itself is patter; for example Cardini's act and Jeff McBride's act are two of the most meaningful performances I've ever seen, but they are completely silent. The patter is in the characters that they developed. Teller's patter is present in his partner, etc.