That 6D kit (with the 70-300f4-5.6 IS USM), wow, it's like they're throwing one of their best lenses at you for free.
While the L version of that lens ranks among their top lenses, the non-L version included in the kit could hardly be considered "one of their best". At 300mm, it's about as sharp as a bowl of pudding.
Thanks for catching that.
I'll go to the corner now and hang my head in shame (I can't believe I missed the lack of an "L", the most important designation in Canon's naming scheme).