Unfortunately I can't give you any evidence for this beyond my personal experience with people, and the fact that looking at it this way seems to describe their behaviors more accurately for my purposes.
I don't see any reason to suppose that the antithesis between Thinking and Feeling, when they are oriented in opposite directions
, is all that significant in the first place. I don't find the antithesis between Ti and Fe nearly as significant as the antithesis between Ti and Fi or Te and Fe because, as I mentioned in a previous post, Ti deals with introverted judgment and Fe with extroverted judgment. In short, they don't interfere with each other because they don't make the same types of decisions.
Explained above. To recap, I will use ENFP as the continuing example--in my experience, ENFP types, since the most natural way to experience Feeling for them is through internal stimuli, if they discover that this method is not working, they seem to assume that Feeling is not going to work in this situation, so they switch over to Thinking ("I've tried being nice, but it's not working, so no more Mr. Nice Guy!"), which for them is most naturally simulated by external means and expressed through a Te attitude.
Indeed, I do conclude that. Look at some of the argument threads on this board! All the evidence you need is around you in the form of disagreements between others. Look at the numerous "I don't get Fi!" threads all started by Ti/Fe users, for instance. Note how the TPs tend to align with the FJs and the FPs with the TJs--this is because they share the same preferences for judgment functions.
Every time someone makes a thread about "I really don't get people who use x judgment function", you can see two factions line up: The Ti/Fe-ers (TPs and FJs) vs. the Fi/Te-ers (FPs and TJs.)
If the Fi dom/aux people (xxFP) were more natural users of Fe than Te, wouldn't they tend to align with the FJs moreso than the TJs? And yet they don't. You would see more even divisions across T/F lines, and yet that doesn't happen, as TPs tend to make decisions in a much more similar fashion to FJs than they do to FPs. Why do you suppose this is?