Yet the X-terminator can beat a radio shack 102" SS whip.It's not that
the X-Terminator is so good. It's that the 102" SS whip is just bad
enough that the X-Terminator can beat it. In other words the radio
shack 102" SS whip is not ideal.
Do you have any hard test results to back up that claim? Has the
X-terminator been used on a side by side basis with a 102" whip on say
the Lockheed Martin ant test range or is it personal testing you have
conducted? Is it just the Rat Shack whip you are comparing it to or
other maunfacturers (like their is a helluva lot of them)?

You don't need a antenna test range to determine relative gains.
I can only confirm the antennas I have tested. The R-S 102"ss
and the Workman X-Terminator are two of them.