The part you quoted does disagree with the article, but not with the part you quoted: RRC said we can measure the delay, and it is 0. The article said we can derive the delay, and it is almost 0.
That aside, yes, RRC's comments are often lacking in one way or another. However, they're also solid attempts at explaining something ad hoc, a very valuable thing on Reddit.
"The net result is that the effect of propagation delay is almost exactly cancelled, and general relativity very nearly reproduces the newtonian result."
That aside, yes, RRC's comments are often lacking in one way or another. However, they're also solid attempts at explaining something ad hoc, a very valuable thing on Reddit.