Early on in the 2010 HPDO Willem and Maarten are trying to keep the boat going to weather in lighter air, before the breeze filled in. PhotoBoat’s shot here shows pretty respectable air flow over both sails.
Telltales are not straight back as the wind is just too light. Maarten is sitting to leeward which allows Willem to stay high and see what is going on. But still there is a bit of induced heel that will help reduce drag a bit.