I think that your point about type specificity is a particularly strong one.
The AA5 I use for trundling around the UK to meetings in is pretty content with either power-and-pitch or pitch-for-speed, and particularly on an IFR approach I'll usually tend to fly to use power-and-pitch as much as anything because it's how I was taught when I learned instrument flying in the type.
I'm in the middle of a test programme on an SLMG at the moment, which is the complete opposite. Whilst it's not particularly lacking in power, the airspeed response to speed is pretty small and sluggish. On the other hand, it is very slippery and incredibly responsive in speed to changes in pitch attitude, and as I develop an optimal landing technique, I'm gravitating towards throttle closed / stick for speed (but by the way, if I'm too fast, it flattens the approach angle out, as best glide is above 1.3Vs), then fine-tuning the approach angle with airbrake.
G