Jamie,
You can take three average (i.e., bogey) golfers to ANY course with a rating over 70 and slope over 100 in 25 mph winds with gusts up to 40 and I'll bet you at least two of them shoot over 110....
But how often have we seen wind at those levels at any major championship? Maybe the day Tiger shot 82 in the Open, not sure its got that strong any other time in the past decade.
But in moderate wind, the Bandon courses wouldn't cause those bogey guys to blow up, but a course that keeps itself tough all the time, like Oakmont or Muirfield, is going to bury those bogey golfers even on a totally windless day because there is just no margin for error.
I'm a five and I played Muirfield on a day with almost no wind, the summer before the Open was held there. They say they cut the rough down before the Open after seeing it on TV compared to how it was when I played there I believe it. There was an area I hit into on the left side of the 2nd fairway where the rough was chest high, and it was blind luck I was able to find my ball and somehow move it sideways 10 feet out of that crap. At lunch when everyone was comparing how they did, no one mentioned score, it was all about how many balls you lost. The one I lost was the lowest "score" I heard from anyone, with three the next lowest! All I know is I'm damn glad it wasn't blowing 25 mph and gusting to 40 that day!