Granted you don't need to type all that fast for programming. However I do have to type full-speed when writing documentation, composing an e-mail, working on a presentation, etc.

Not to mention Dvorak and "crazy non-standard keyboards" demonstrably reduce RSI, which is a far greater benefit than typing speed. (Unless you like having disgusting chemical compounds injected into your wrists; or want your wrist cut open so that doctors can work on some of the most delicate tissues in the body.)