My average typing speed is ~140-150WPM and I can go over 200 in short bursts. I've only used QWERTY. Thus I don't think Dvorak or any of the other layouts has that much of an advantage.<p>However, I think the design of the keyboard's switches makes a huge difference; I can only reach those speeds on the keyboard I normally use, which is a pretty generic one with rubber domes, but where ~2mm of travel is enough to register a keypress, and the keyfeel is very light and bouncy. Before that I used a mechanical keyboard with (very) clicky Blue ALPS (<a href="https://deskthority.net/wiki/Alps_SKCM_Blue" rel="nofollow">https://deskthority.net/wiki/Alps_SKCM_Blue</a> ) switches, and struggled to reach 120WPM. Other keyboards I've tried timing typing speed on include a Thinkpad X60 (can barely exceed 100, but quickly tiring), Apple low-profile (80-90, very tiring), and the famous IBM Model M (75-80, impressively loud and extremely tiring.)