Personally I wouldnt care. IMO these are marketing ploys that the shops try to achieve to pull in customers. Yes you will hear 'they dont do used parts' or 'they follow factory procedures', which while possibly true does not mean another shop cannot do the same. (You would be shocked at how few 'factory procedures' there really are on bodywork repairs...)

As long as the shop you chose will go to bat for you, and understands your demands for a perfect result, THAT is what matters.