To engage the rail quicker out of the help of a strong back foot push and all other tricks well explain in the last post of this very interesting topic, boards have to be design with a wide point pull back the middle of the board and therefore have to get a pull in nose which is a not as common design except for the pro's board of 7'+ or sub 8'.
Riviera Whirling Dervish SUP is a excellent exemple of that kind of very manoeuvrable design .
Have to say that Bert from Sunova is doing that kind of loose board too