[old_tv_nut]

Voltages given for the G2's are just what was measured on the particular set that was used and will vary with adjustment, as you said.
Voltages on the cathodes also vary with video content, so may be quite different if you use a different test pattern from the one used in the service info.
Volatages on the G1's also vary with video content in sets where the color difference signals drive the G1's.