There is a reference library on this board that has a lot of good reading on the topics of sandbeds:
http://www.canreef.com/vbulletin/forumdisplay.php?f=47
Have a read through it
When I was in Calgary, the first LFS I dealt with encouraged BB as well. I wonder if it's the same one?
I tried BB for a while, but have always enjoyed the added diversity of DSB's.
Mitch