I think Coding Horror gave a fairly succinct overview, including sources[1]. As usual, it's incomplete understanding and cargo-culting of opinions until the statement in question bears little resemblance to the original assertion.
Yes, there's far too little of this. I'd love something that combines the good points of Powershell and a GUI file explorer for example. Even the primitive out-gridview or ogv is incredibly handy.
I've heard more people say this than that GUI is faster. Also it really depends on what you are doing.