Guest...Exocet removed them from their formula and the cutouts are more conservative like Starboard...
Yes, really interesting Exocet approach for its 2007 Warp Formula:
Rather than "more conservative". it seems that Exocet combines both deep and thin cut-outs: at first stage water flow under board meets thin cut-outs, then it undergoes an expansion in a wider area in a way comparable to older (and deeper) cut-outs...
It would be interesting someone REALLY QUALIFIED in hydrodynamic issues could explain for once the working of cut-outs (and air pipes) and their REAL influence on windsurfing performances and efficiency.