I just read those few pages of the thesis. It seems to imply that concurrency has some sort of 'locking' or 'coordination' component. The 'Thinking in Parallel' article makes no mention of either of those concepts - Quite the opposite.

In French, the word 'concurrent' literally means 'competitor' - Which in our case implies competition for computational resources (E.g. specific memory locations) - On the other hand, the 'Thinking in Parallel' article talks about how to partition resources in a way which removes the element of competition between processes - So the word 'Parallel' seems fitting.