I like it too, I think it's a big step in the direction or more realism and, hopefully, more realistic scores. In real life you don't stand on the tee and know the wind is blowing at a constant 11mph from the South West or whatever.
However, I'd have liked to see more variation, I think 2mph isn't enough. Maybe have 3 for low wind, 6 for medium and 9 for heavy. That way if you're playing medium or heavy wind to a pin close to a roll off, RSG #9 or 18 for instance, you'll have to play safe and have a long putt for birdie or risk a pitch and putt to save par if you go for the flag.
I have heard of one player who saw a big variation at St. Andrews but it sounds like it may have been a one off.