It affects me. I buy "Acme" and "Brand X" exclusively.
Man, it's hard to beat that Brand X stuff. It really takes care of pet stains on white shag rug.
I have watched people in the store buy a name and pass up a store brand that was cheaper. If only they knew that the store brand wasn't just "comparable" it was actually the exact same stuff just packaged a little earlier or later in the day.