Direct Mail Postcard With A Definable Response Rate

[David Wurzel]

Does anyone have a postcard that they have tracked and noted that the response rate is better than the others.

On most every yellow letter website it is just the same old same old.  

How are you supposed to build a brand or stand out when you look the same as everyone else?

If you have something, I am not asking for the secret.  I just want to know if you have solid numbers and research that back it up.