It's obviously an over-simplification, sure, functions are much more complex than that and, sure, they overlap each other in several points.
It's all about the path each one follows when processing a though. Tis are more prone to take the raw data and process them and build of them and Tes are more prone to take the raw data and try to fit them in something they've already constructed. Tis care about consistency in the steps of the construction, regardless the result and Tes care more about consistency between the perceived idea they already have and the way the data can be analysed.
By the way, you should notice that I didn't refer to BlueWind in particular, but to Te-dominant thinkers. Though I rather believe that BW's way of thinking is more characterised by Te.
As for the educational aspect, while you maybe have a point there, I'd say that surely all the philosophy or mathematics students are not likely to process the information with the same way.