I just reread 210.52(C)(1). Can someone explain the logic to me? Why would you ever want a receptacle behind the sink or cooktop? I think it is pretty much guaranteeing that the cord will drape across the stove or the sink. I just don't see why the code body thinks this should be REQUIRED. Isn't the NEC supposed to require things that enhance safety?
If and only if there is enough depth of counter behind the corner sink, someone
might want to put a coffee pot, toaster, or other appliance back there. It looks like it might be an ideal use of space to put an appliance garage, for a mixer or whatever, in the corner and use the appliance by moving it to either side of the sink.
But I would not like to see a receptacle behind the sink used as a contribution to the required receptacles per wall length on either side of the sink or cooktop, and indeed the drawing specifically excludes that use even if depth behind the sink or cooktop is greater than the minimum allowed which exempts the space behind from the receptacle requirement.
So, what it comes down to is that if the space in the corner is large enough, the wall area will be counted for the spacing requirements,
but in addition there still has to be a receptacle within the 24" section on either side which is
not behind the sink.