Er...or click on the dvorak link on your QGMLWB site. There's no mention of 'heresay' or 'rumour'. What they do say is:
"Chances are you don't know anyone who types on Dvorak. This is unfortunate because Dvorak significantly reduces typing effort and the likelihood of typing-related injuries. "
"First, Dvorak is very good at keeping fingers on home row - 71% of keystrokes land there (compare this with 34% for QWERTY). This alone is worth the price of admission. Dvorak bottom row usage is very low at 9% (15% for QWERTY). Dvorak favours the right hand by 14% (QWERTY favours left by 15%). Dvorak has more uniform finger usage and makes greater use of the pinky (18% vs QWERTY's 10%). "