Umm, and with deference and respect to the "fluffyphiles" here, I get the distinct impression that there is insuffient materiel to support one view or another. So, could there be any mileage in just settling down and defining (or re-defining) them?

For example, taking what Stompazilla presented we could say that :-
- Tau are happy to give up territory to gain an advantage
- Tau use this mobility to avoid combat unless they have an overwhelming advantage
- Tau can form strong defensive positions from which they launch their assaults
- Tau make extensive use of technology to compensate for the limited number of soldiers

etc

_________________
"Play up and play the game"

Vitai lampada
Sir Hemry Newbolt