40 alpha runs.  Flooding hard. Jibed off waves with feet side by side near the front straps like a step jibe and pumped the sail hard to stay on a plane before hooking in.  With the big sail, this worked even on the 90 L board, and the little board did not buck much jibing over the chop.
 
Obviously, if you go fast through the final, slowest part of the jibe, you not only have a faster average speed but also spend less time going through that slow distance and that slow speed contributes less to the average.