We really haven't given the crossed-oar method much attention here on the Gondola Blog.
I'll have to remedy that soon.
In the mean time, here's a clip from YouTube worth watching:
This one is a shorter and more concise clip.
The "valesana" style of rowing is a dream-come-true for pragmatists.
It's so effective.
For people who like to text, multi-task, or just itch their nose from time to time while rowing...it's not as permissive.
One thing's for sure - it's not easy.