Try to read a few more of the posts, 5K at WOT is right (no mistake) but you need to be sure you are reading the right end of the potentiometer. It will apear as if its backwards if you read on the wrong end of the pot.
You are right about the FSM having an error about the "1 ohm" It should say 1K ohms. 5k at WOT, and by the manual (if corrected) 1k or under at idle. I have found a little higher (about 1.4k) to get better MPG. I have found no problems with this setting after driving over 100k miles with it.
It seems as if the other sources you quoted take thier info from the FSM and just repeat the error of setting it "under 1 ohm".