Still wouldn't make a whole lot of sense, though; really makes me wonder why Steele did it when all it served to do was add a very suspicious element to an otherwise convincing story.
Perhaps Steele is someone who understands Vasudans very well? As far as I've been able to understand, the Zods are not the kinds of people who are willing to bet too much in single bluffs like the Tevs are. If that's the case, then it is conceivable that despite understanding the human techniques of bluffing and cheating, they are not that good at the game. They will understand if you try to bluff them (a pathetic race if they couldn't), however when you enter a zone of double bluffs, triple negatives and so on, their BS detector maybe just isn't able to cope very well.
The kind of reasoning I'm using here is like one of RTS balancing races and so on, as if we could fine tune every "race" characteristic in order for them to have differentiations but still balancing themselves out. In this kind of reasoning, the Zods would have the advantage over Terrans of belonging in a different "time frame", being able to cope better with long-term crisis and so on, but the Tevs would be much better at very short term bursts of crisis, being able to foresee, plan and act much better these kinds of bluffs, double bluffs, all kinds of tricks and so on.
Note however, I don't like this "kind of reasoning". RTSes are fun but utterly unreal and ridiculous. I never bought this kind of perfect equilibrium of tribes. Some will be superior to others and that's just life.