In terms of transactions moving from point A to B, PayPal and others might be the fastest as long as payments occur within the ecosystem of these services, but the main point of importance is the time they need to settle. In most cases Bitcoin transactions settle (i.e. confirm) usually within 20-30 minutes. PayPal and others have a settle time of more than 60 days in which people can charge back if they so wish -- that's quite a difference, isn't it?