gr8flbob:In WGT-land wind is a variable, both in direction and in strength - my estimate is 20% either way. Wind is also impacted by trees and terrain - that is impact of wind will vary by course played and the conditions of the shot you're facing.
I agree that many elements have an impact on the wind, so whilst it ma be a 20mph wind, different courses produce different results.
Links courses in general are very difficult to gauge the wind, and what is blowing at the tee may be totally different on around the green or vice versa. They usually have few trees but can be sheltered by the terrain and even subtle gradients seem to make a difference. So I think WGT have tried to replicate this, so the wind strength may be the same (the OP's question) but the effects are different.
I remember playing in Scotland once, tee was blowing a gale, slight downhill par three, I teed off and could see the ball moving a lot in the wind, as it came down the ball just sailed and sailed on against the wind, when I was walking to the green there was hardly no wind and I was 30 yards long in deep chit. So whilst the wind was still howling, it had no effect as the ball dropped below majority of the wind. Of course you can get the reverse with "upwinds" similar to sheer in an aircraft.