[BillA]

Stew backed me into that corner, how can I say that artificial test results are more meaningful than actual performance data ?

testing is/can be a guide, but the the goal is a performance increase
if the test yields data that is found to be useful, good
if not, revise the test or the analysis

until now it seems, the various heat sources produced different results but not in extreme conflict; but now the Apogee results 'don't fit'
such is something for investigation by those with an interest, but there is a very handy arbiter, actual performance
(and if we say that we cannot discern based on performance, then what is going on ?)