On the clotting/suturing of a smooth cut vs. jagged: Any physiology book will explain that as the surface area of a cut increases, so also does the clotting factor (i.e. faster clotting). Consider two cuts both 3inches total in length - one is perfectly straight the other is zig zag in shape (jagged like a tear instead of a cut). The total surface area is greater on the jagged 3 inch cut than the straight 3inch cut - the jagged one will clot quicker.
My guess (repeat guess) is the surgeon woudl prefer to sew up a straight cut AND if also possible he/she means that the two sides of a straight cut are more apt to line up perfectly - this would assimilate pressure and speed clotting.
Just a physiological persepctive on this - keep bh's sharp
mg