Yes, it's an education barrier. BRL (Scheme adapted for web apps) has survived numerous attempts to quash it at my employer over the past 7 years, as different managers have needed educating.

The other education barrier is with programmers. The "Wow, this is simple and useful!" response comes in 15 minutes using Python or Ruby. With Scheme or CL it comes in a week or two, though it's stronger. I don't know if s-expr notation will ever have immediate appeal, or if it needs to grow on everybody.