First off congratulations on the new forum.
In regards to this topic, I was initally taught, as you all apparently were, attitude for speed, pwr for descent. A sideways view of my approaches probably looked similar to the NASDAC chart.
I was then taught the the other method,(also taught by the RAAF in Aus), pwr for speed, attitude for aimpoint, I found that my approaches were more stable and therefore less irrating for the pax and more importantly easier for me.
I have also taught both methods finding that the student generally coped easier and progressed faster with the the pwr for speed, attitude for aimpoint process.
I moved on to bigger and then even more bigger and have found that the training for anything bigger than a GA light single, was pwr for speed, attitude for aim point.
A search of the Instructors forum will also be worthwile as I think this was discussed there sometime ago. Another post worth looking for is the one on the "Jacobson Flare" ,another technique that uses the "point and squirt" (I like that)type of style.
Anyway, may I suggest find someone that knows how to do both methods and "Try it, you might like it".
Regards