I believe all the same mechanics are in motion as one sight reads music. Although one isn't reading the "scrambled middle's" of words, the musician, through their experience of seeing similar notes on a page, can focus on translating phrasing, dynamics, attack/decay and the conductor (all at the same time) because of familiarity with the syntax and semantics at hand. My suggestion is quite evident (to me) as property #3 marks precisely that:

"Of the 15 words in this sentence, there are 8 that are still in the correct order..."