Small quibble: I think it's unfair to many Austrians to imply that their school inherently eschews the type of mathematical formalisms that many prominent Austrians did, in fact, reject. Or at least, insofar as they do so, it's based on more than simply saying that the map doesn't reflect the territory, and therefore we must throw it out - they make elaborate arguments about how the map's systematic inaccuracies make it a poor representation of the territory. (Apologies if I'm using the map/territory metaphor poorly.)

Admittedly, this opinion goes against what seems to be reflected on the almighty Wikipedia, and I realize that pinning down the essential features of a school of thought is a pursuit which is fraught with problems, but my impression is that there are a substantial number of Austrians who do not reject modeling per se (as was the case of Hayek), and labeling this tendency as a deviation from Austrian thought strikes me as a No True Scotsman argument. Perhaps someone more familiar with the Austrian school could correct me on this, however.