The article fails to acknowledge that MIT and Olin have 2% drop-out rates because they are f*ng hard to get in in the first place.

The drop-out rate is directly proportional on how easy it is to enroll in a hard program.

The school I graduated from, FEI (in Brazil), has a very high drop-out rate in the first semester - about 50% on my freshman year, mostly due to calculus and physics. It's also regarded as a top private school in its field.

So, that's why those teachers are not being fired - because students pay for their first semester whether or not they stick around for the second one.