You are correct in what your saying Robo, a wider dwell angle is required for lower rev range application & a narrower angle for the upper rev range application, which most older ignition systems don't cater for. So the introduction if this system will provide the user with quite a substantial technological upgrade from even an older model electronic ignition system.
The advantages should be a better more even torque application throughout the working rev range.
I'd also like to point out that this is not new technology therefore I don't think reliability issues will be a factor worth concern in the newer Pertronix Ignitor II
Just my view.