TEPaul,
But, what if it is true.
It's hi-tech, with longer shafts, lighter oversized heads with weighting that makes the ball go straighter, thus you can swing harder/faster.
Limiting shaft length to say 43 or 44 inches, clubhead size to the 250 cc range and some other modificiations would slow down swing speed, ergo distance. Combined with COR and spin regulation distance wouldn't affect golf courses as it has in the last 5-10 years.