That's the highest I've ever seen. My state doesn't have a direct definition of the limit of power, only that you must be on a bicycle (pedals), must have a valid driver's license, must wear a helmet, and be of the age of 18 or greater. If you are under 18, you must complete a minor affidavit to which your legal guardians (parents, etc) are responsible for you. Also, you can only ride during daylight hours and no more than 7 mile radius from your home is allowed.
This state has close to what you wanted in that minors are restricted and adults can (within reason) do a lot more. I'll go dig up the e-mail again, but I asked the DMV this same question and go a very straight forward that adults can go as fast as they want as long as it's within the same laws that a vehicle must follow (speed limit, stoplights, etc)
So if your e-bike can do 80 mph, then as long as you don't speed, cause traffic accidents by cutting off vehicles, stop at stoplights, stop signs, etc. then there is no reason for a cop to pull you over. I'm often doing 30 to 40 mph all around where I live. I have police go by me all the time, never blink at my bike. My next NiMH upgrade is going to jump my speed up quite a bit more, so instead of maxing at 37 mph, I'll be closer to 45 to 50 mph which is well above many of the speed limits where I live (most are 40 mph tops)
It makes me laugh to think I'm going to have to follow the speed limit on my e-bike to avoid a speeding ticket. I can hear the judge laughing now.
To top it off, there are some areas around where I live that have hills that are so steep that many riders in my bike club have gotten speeding tickets on their non-motorized bike because the long steep hill easily allows a 45 mph coast on a 35 mph road. They all lost in court too, because even bicycles must follow the speed limit.
