typos do that to me too. I can't tell you how many presentations I've been through where they use the wrong "complementary" and I just stop reading/listening.
Funny you say that, I was visiting Colleges with my son this season and during one presentation, in front of about two thousand people, they misspelled a couple of simple words. I might not have caught them, if they were on a piece of paper but these words were two feet tall, in red letters, on a two hundred foot wide screen! I turned to my wife and son and told them that if they cannot spell nor proof read during a sales pitch, it might not be the best place to get an "education" from, especially not at $30k/year!