I've mostly used Australian broadheads - Outback, Crafted, Kayuga, and Extract. Besides the Outbacks, they all advertise 'sharp from the packet', but I put an edge on all of them anyway. Some of them appear polished and they may cut paper OK, but if I drag them along a finger they don't really grab the way I want them to.
I normally give them a hit with a flat Stihl chainsaw file, then run them over a fine diamond rod, and then maybe strop them on some leather or cardboard and run them over a polish steel. I don't necessarily do all of these all the time but they're just examples of how I normally go about it. I'm not an expert by any means but without question, the edges I have on my broadheads is superior to that edge they come with out of the packet, and if there are any limitations in my bowhunting setup, the sharpness of my broadheads isn't one of them.