I'm old enough to have seen actual Pepsi vs Coke blind comparisons live, in person. And life long Coke drinkers were riding at about 70% expressing that they liked the Pepsi sample more than the Coke. After being told that they were liking Pepsi better all proclaimed (and this may sound familiar) that it was rigged. I can assure everyone that it was not.
When I was younger, there was almost never a time that I didn't have a Pepsi with me. I drank Coke and lots of it when I was really young (that's what my Father drank), but some time around 7th grade I discovered Pepsi and never wavered from it. Until I got older and now the only soft drink I have occasionally is Diet Dr. Pepper.