There is no Apple cult. They just make good products. Unlike a cult, you won't get punished if you switch to another product. Unlike in a cult, you aren't threatened to use their products. That's the main difference from being a fan of something, and following a cult. And people still, despite this, use their products. So there is another reason.
Plain old-fashioned good products and good marketing. Boring?
If the 4S sucked, it wouldn't beat most if not all of the competition at optical quality, speed, display sharpness / dot pitch. I see little competition with these features as well as an AI assistant of Siri's quality in the same mobile phone. And that's how you sell. You may not like these features, you may not be perfectly in their market segment, but obviously many are, or they wouldn't purchase this phone.
I love
Products but it hurts to grown ups/adults acting like kids over a phone, how many people give to charity???? but can run a buy a product fast. The 4s is a decent phone but so is the 4. To me the change from 3gs to 4 was a better and bigger transition compared to this one just my opinions