Actually he seems to know a lot more than your usual hack. I mean what average DIYer/handyman would know about crimp sleeves and proper tools to use them? Also you've got to give him credit for actually supplying a ground instead of suggesting anything illegal.
There is of course the issue of the non-GFI receptacle but is he in fact technically required to install a GFI if he didn't really change anything in the kitchen except for hooking up an extra ground?
Considering the age of the wiring I'm fairly sure that neither room is an addition but the house dates back to a time when grounds were required in kitchens but not in living rooms, bedrooms etc.
