Jellycopter - most helicopter horizontal stabilisers are upside down wings designed to produce a downward force to keep the fuselage attitude more level in forward flight - the direction the air is coming from eg from the front or the back is immaterial and a tailwind would not produce more downforce than a headwind, especially at the low airspeeds we are talking about in the hover.
The strake on the Sea King is designed to disrupt lift on the port side of the tail boom and only affects pedal position and thus hover power in a crosswind - the old girl used to run out of left pedal in a right crosswind because the tail boom was creating lift horizontally to the left and more left pedal was needed to counteract it.
I am particularly amused that so many pilots with a fraction of the knowledge and experience of Nick Lappos insist on rubbishing his explanations just because they go against what they were taught at flight school. Just because your instructor knew how to teach you to hover doesn't qualify him/her as a TP - they are regurgitating the same lessons and opinions that were taught to them - Nick is trying to highlight that knowledge of helicopter aerodynamics has moved on and the old wives tales from the past are mainly fallacies.