Does whitelisting, anti-abuse association membership help deliverability?

Do these measures (whitelisting, being a member of an anti-abuse group) actually help deliverability?

In our experience, we have found these do not really help deliverability all that much, as long as you are following the above mentioned guidelines and best practices. While some companies promote themselves as having whitelist agreements with major providers or being members of a bulk messaging group, we tend to think of this as a lot of ‘smoke and mirrors’ in that it actually doesn’t truly help anything.