Does anyone still read this stuff?
Okay, we'll be honest here: Reader-Response theory isn't exactly the most visible theory around today. Sure, the ideas of Reader-Response theorists have been incorporated by a whole lot of different schools, like Poststructuralism and New Historicism. But the Reader-Response school isn't as flashy and sexy as some of these other schools are.
We kind of take it for granted nowadays that different readers will have different responses to a literary work, and that there isn't just "one" objective meaning that can be found in a text. How you read a text depends on who you are and what your perspective is.
Just because Reader-Response theory is low-profile, though, doesn't mean that it hasn't got a lot to offer.