could anyone comment on the validity of the explanation provided below?

Following are some of the frequently occuring contrast conjunctions on the GMAT CAT , that can be highly helpful in reaching out to the final answer.

CONTRAST CONJUNCTIONS----> ALTHOUGH, INSPITE OF, DESPITE, BUT :

Example : I took the GMAT BUT I did not apply to a Graduate School of Business.

The normal expectation is that if one takes the GMAT, then one applies to the Graduate School of Business.

BUT tells us that the normal expectation was belied in the situation described

Consider another example:

Chinese Scientists had long known that the flow of blood was a continuous circle controlled by the heart, BUT the discovery was unnoticed in the west.

The contrast described is that the phenomenon was known in one part of the world BUT the other part of the world was completely oblivious of it.

In some sentences, we will be required to express a positive or a negative contrast.

ALTHOUGH is a conjunction used to express a positive outcome in the face of a negative quality.

EVEN THOUGH is an extreme although. 

Although it was raining, we went to the movies.

Even though it was snowing heavily and the roads were treacherous, we went to the movies.?Do you see the extreme situation presented in the sentence using even though?

EXAMPLES:

Notice that Although a negative , a positive aspect to the above sentences.
Let us see how

Although I did not prepare well for the test, I received a very high score in the 90 th percentile.
Although Chimpanzees have only half the human intelligence, they are remarkably perceptive.

DESPITE or INSPITE OF is used to express a negative outcome in the face of a positive quality.

Despite or Inspite of is correctly used.

EXAMPLE:

Despite its enormous resources, the United States lags the third world countries in grade school
education.

Despite the fact that we started early, we arrived at the destination very late.?

Despite their intelligence and advanced education, terrorists use their knowledge for evil purposes.

Notice the Despite a positive, a negative aspect

to the above examples.

CAVEAT: GMAT answer choices do not normally use Despite correctly. Before you are tempted to pick an answer choice using Despite or Despite having forms, check to see whether these expressions are indeed used to express a negative outcome in the face of a positive quality.

I am no expert on english o coment as such ...

But if the explanation is correct then it is very good as i understood it completely.