Wlfgang debunked it nicely on another thread, pointing out that the above passage was made deliberately easy to read.

If you take this passage:

it deosn't mttaer in waht oredr

you can see it. "deosn't", "matter" and "order" have only one letter out of place, and the phrase "it doesn't matter" is so common it helps you figure it out.

"it d'stnoe mtetar in waht oedrr" is harder to see.

How about:

The suceenqe inst' pluairatclry scianfiingt