Yea, I know what you mean. Although I was just a kid in the 80’s you can tell it was a difference. However, certain states like California have always had a rich history in supporting and keeping the sport alive which is why they run say, 20.8 vs 22.1 in other states finals.
http://www.youtube.com/watch?v=GwNHjPqqJmc&feature=related (CIF California State Meet 1995 Boys 200)
Just look at the crowd, that alone should tell you something, I remember my state meet in PA, it had just a hand full of people.