Around Nashville our stores have nothing but Rose Gold 7+ and only the 32GB models, not all Apple stores are equally as easy.Why Target? I went to an Apple Store Sunday morning and got a matte black Plus easy peasy.
Eastiest/fastest I ever got a Plus. I posted about it and some folks said screw their preorder, hopped down to Apple and got a Plus.
Target would be my last choice, probably easier at Best Buy as well.