I wasn't kidding. :) The advice in that blog post is fine if users like your mom are not going to be part of your target audience, or if she'll use it just because she's your mom. But if you send her to the homepage and she can't figure it out, I think thats a great focus group. If she's not technical (obviously, I don't know your mom) and she thinks its a breeze, you've done an incredible job. I won't say more, since having conversations about people's mothers never seem to turn out good, but in this case, I think it would be great to see how your mom uses it. Note that I said "how she uses it," not if she likes it. Of course your mom will like it :) Er, hopefully.