Sorry it took so long to repsond, but I was cleaning up the coffee that I choked on while reading this!!!
Either you are misinformed or uniformed.
The level of discipline 30 years ago was nothing compared to today. We practiced about an hour a day before school. It was too hot after school. (That's what we thought - it was in Texas on the asphalt parking lot that bands now spend 2 hours a day in the heat of the day rehearsing on) We were considered one of the top bands of our day, with consistent top scores to prove it and yet there was nothing near the effort as that put in by today's band kids. Ask around to the parents of today's band kids. Many of them were in band back in the day. The ones I've talked to, from all over the country, agree that much more effort is put in today than it was then.
It was the 70's - rebelling against tradition and establishment was the rule of the day.
"The same way they dumbed down the SAT because too many kids were failing it and they wanted to raise the pass rate which had been slipping in recent years at that time. "
I seriously doubt it was the band kids that standardized testing was "dumbed down" for. Perhaps you should take a look at the following Music Education Facts.
http://www.menc.org/information/advocate/facts.html
If you're talking about kids today as a whole group, then you're completely changing the topic and should be considered on a different forum. This one is about band and the kids, teachers, parents and fans of such. I think if you reshearch a little more, you will find that band kids ranked amoung the highest performing on standardized testing before and after it was "dumbed down"