That is so sad Jeff, you mean ya'll really only get 5 kts of boat speed out of 10kts of wind on a beam reach?
I get better than 7, more if I fart often.
By 15 kts I'm breaking 10 boat speed on a beam reach, with or without farts.
Polar plot available
On the other hand, in 30 kts I'm cowering in the pilot house with the motor running