What a coincidence, because I just did the I-17 thing today from Camp Verde south to New River Road here in Arizona, similar to AKjitsu above. (Hi Jerry!) Although I didn't get the finger from the nuns, I was indeed often getting passed even though the cruise control was maxed out. And, identical to what was stated, the maximum on mine was 82 indicated and 80 GPS! (How do it know?)
This is off-topic, but what the heck: I have installed the V-Strom knuckle guards on my 2013 and they work fine. Yes, full lock to the right causes them to hit the fairing at about the last 1/8 of an inch, but the fairing/knuckle guard combo has enough give that it still reaches full lock very easily. And as for me, my use of full deflection in turns is, shall we say, rather limited. I like the guards, just like I did on my '05 and '08!