it is intererting the today's naturals are bigger and drier than pros from 30 years...the human body sure has changed a lot in 30 years.. 
The drier part isn't that big of an issue. Back in the day, bodybuilders got marked down for appearing too ripped in contests. To the judges, the look was unhealthy. The mega-ripped look became a way for smaller bodybuilders to impress the judges to make up for the lack of size (that's how Frank Zane earned 3 Olympia titles at the expenses of Robby Robinson and Mike Mentzer).
Supplements have changed GREATLY over 30 years, as well. 30 years ago, bodybuilders has little variety, as far as supplements went. Most were just concentrated forms of food (i.e. milk-and-egg protein powder, dessicated liver tablets, etc.). Now, you can take lots of creatine, without having to down half a cow in the process. Or, you can take herbs that (in high doses) are diruetics to get rid of excess water.
Now, does that mean that everyone who competes in natural bodybuilding contests are "clean"? NOPE!!! But, that certainly doesn't mean that everyone who enters such shows are using drugs. What I'd like to know is how the drug-using competitors feel when they enter "natural" shows and still get beat. They may be the biggest ones crying foul.
