As to speeding it up, I don't think it would cause as much of a problem - except to really anal people with perfect pitch. (j/k!)
Ha! Perfect pitch is a blessing and a curse. To be honest, only about 1 in a few thousand people have this, and of these, they wouldn't know it unless they had musical training. So people like me are far and in between!
For everyone else, it's probably unnoticeable.