Originally Posted by Nihil679
Have you considered the fact that Quinn might be an attempt to change the way you think about AD carries? Just because no other AD carry has initiated in the past, should that hold you back from trying it now?
"Burst" can refer to different things, in this case, Valor offers a "burst" in damage output because of his always-on passive from W. This results in a burst amount of damage that you wouldn't have otherwise as Quinn.
Quinn is an AD carry designed like a bruiser, not the best of ways to go about changing the way I think about AD carries, since bruisers and AD carries are literally polar opposite play styles. Initiating with a gap closer as an AD carry is the same as getting grabbed by Blitzcrank, i.e. it's not good. The only difference here being that the enemy support (or Blitzcrank) doesn't even need to use their CDs to bring you in the middle of their team.
The term "burst" is debatable yes.