These friends of yours weren't really computer users back in the day then. Every old die-hard computer user from the 80s and early 90s I've spoken to has heard of, used, or even owned, an Amiga.
One of my old co-workers told me a story of how he drove from Orange County to San Jose to get an Amiga on the day it was released. He drove up at night (it's about a 6 hour drive), got a hotel room, and couldn't even sleep because of his level of anticipation. He got up the next morning, picked up the Amiga when the computer store opened, and drove straight back home to start using it! (BTW, he still has it and an A2000 in storage... knowing him, everything is boxed with reciepts. Might be a good thing to get pictures of some day...)