Yeah that's right. Another thing you can do when the pressure is built up too much is draw them down. Yeah, Robert Chu is someone who I have an interest in. I really liked what he had to say on wingchungeeks. Also like what Alan Orr says. I hear he is in New Zealand now so it would be good to meet him one day. However, from his site it doesn't look like has a wing Chun school as such.
Yes as someone said, a lot of it is simple body mechanics. That said many schools don't put any focus on it.
Alan Orr is in New Zealand and has a Wing Chun school. It is within an MMA gym. But not all of his students are training to be MMA competitors. Some are there just for the Wing Chun. You absolutely should try and pay him a visit. He is a nice guy and very good at Chu Sau Lei WCK.