honestly does it matter?
rated life of the flash is 10,000 cycles, they have been bit banged for over a mil
I have been abusing my original, first bought 328 for over a year (though I do keep a boot-loaded backup in a special bug box) including hooking it up to reverse voltage for a questionable amount of time
can "they" tell, doubtful, unless they want to burn out the chip by testing it till failure
this reminds me of apple service tech videos where handing off a pcb to a random individual that enters the room, renders a 1000$ logic board instant trash
course on the apple tech videos they fail to mention that it will be enclosed in a abs plasic case with a micron thin film of esd shielding inches away from a flyback transformer ::)
besides they sent you the wrong board in the first place, really? how hard is it to tell a D board in a esd bag at best vs a boxed uno in the first place, your not dealing with brilliant minds
or in another word, relax