I have. Over the last 2 weeks I have served all my house guests decaf. Flat whites, caps, long blacks and espresso.
The bean I have been serving them is Mountain Water Mexican from Ministry Grounds. This bean has really surprised me. My latest roasting efforts with it were 400g 12:30 to first crack at 194 deg, and pulled 5 minutes later at 204 deg on first snaps of second crack...
Despite all of them "loving" coffee and being used to "my" coffee not one person noticed one bit. Funny part is that not only did no one notice it was decaf but I reveived more comments like "wow, this is great", "this is my favourite yet" etc etc especially from my sister who would point blank refuse to drink a decaf even if no other coffee were available.
So next time you get bored, serve your guests decaf and grin to yourself while watching them love it :coffee2: