PLT scheme is primarily used for education. Pedagogy is (or at least was) the project's central goal.
Clojure is a general purpose project. It is not specifically competing for that space.
I'm sure that the average student can get up and running with DrScheme/PLT faster than with Clojure, but I doubt anyone is going to write an angry article about that.
See, that's the common misconception with PLT. While it was built for education, it's really a nice full featured system for any use. Just use something other than the "Beginning Student" language.
I have to agree. I know CL quite well, and decided to have a look at scheme last week. I wrote a small (but useful) program with PLT and was rather impressed by the amount of library code available. Distributing the program as a small stand-alone executable to a friend was also incredibly simple. Also, I particularly liked the module system and wish CL had something similar.