Guys I think you are missing the point of why you are increasing the speed. You increase the speed to increase the safety margin to the stall. If your flying a long at Vref and a gust makes you lose 10 knots then you could be in trouble, if however you had increased your approach speed then losing the 10 knots becomes less of a problem. On what I fly we use half the headwind component and all the gust to a max of 15 knots.