I don't think the speedup is worth it, but that wasn't why I became interested in the first place. I'm way more interested in the benefits of a more ergonomic layout for my wrists and fingers. I haven't studied the science of that very carefully, but I'm fluent with both Dvorak and Qwerty and the subjective comfort I feel when typing English with Dvorak is very much worth the effort of learning it, for me. It ticks me off a little bit when people discount it as "definitely" a "cargo cult" thing. If you don't like it, that's fine.