I'm surprised you are experiencing wind noise through your boom headset. I use mine to make and receive calls and everybody has said that the clarity is fine, even at 70.
Isn't "gain" affected when using "squelch" ? I know there is no mention of it in the owners manual but I think it works that way. Or it does on other brands. So if he has squelch really low, wouldn't gain be high which would allow wind noise? Just a thought.
Ugh . . . You wouldn't want a CB here in the Dallas /Ft, Worth area. Unless you enjoy listening to the rock haulers or their container hauling buddies.