You're correct, there is so much more to a detector, than just transmission frequencies. However, without a starting point (transmission frequency) software analysis would be useless. I just wanted to state how interesting it is to me and wanted to share the info. Now on the other hand I had one of the head engineers for a detector mfg. state that both Minelab and XP have some of the most intriguing transmit frequency schemes they have seen. Someone was really thinking outside the box. Now for me, I like to know a little more about the transmit side just to give me an idea what to expect or hope to expect. High frequency more weighted to low conductors etc.
To me, I love seeing and comparing the signal strength, not just voltage but mainly the current transmitted. I just love electronics. It keeps me curious not only about detectors but other electronic devices too.
You're right with the "hype" advertised by many of the manufacturers today.