Bob Latham wrote:

Rubbish! I'm sorry but this is so much hogg wash, the differences were so
obvious immediately

Er. the *POINT* of a DBT is to differentiate between the 'immediately
obvious differences' that can be created by poor test conditions.

Unless you can devise a test that shows you werent influenced in your
NON DBT tests, nothing you say means anything.

This is *not* to say that some differences arent so staggeringly obvious
that you dont even need to run tests, but you cant dismiss DBT testing
for subtle differences, just because you can tell the difference between
grossly differing systems without a DBT...