Qwerty keys were not placed as a result of ergonomic considerations. Take the R key, for example. Colemak puts this on the home row. But in Qwerty it was moved to the top row. Why? To make it easier to peck out TYPEWRITER on a single row in sales demos by Remington reps. By accepting Qwerty, you are stuck in demo mode forever.
He has the same opinion as I do. Switching to Colemak is fun!