That's a stupid response. You're the only one who has made claims about what holds in "every state". I don't know enough about the situation in other states to say anything - it's conceivable (if unlikely) that every other state than the one I happen to know about works the way you say; but that still makes it "not every state", and means it applies to a good 12% of Americans.

Edited to add: The comment above was changed from an assertion that the CA law didn't apply everywhere. Responding to the new comment:

Yes, there is a specific impediment law. One that generally permits impediment of traffic while placing some bounds on it. The bounds are more lenient than what a bicyclist should be doing - 21656 would totally permit biking (or driving) substantially under the speed limit for hours so long as you're only inconveniencing four cars, but that would make you a jerk. If someone's waiting on you, get over when you get the chance.