Yeah, I just checked the numbers - for all intents and purposes, while it doesn't hurt to show Rio's opening lines, it doesn't tell you what you're looking for, which is movement from the 'true' opening line. Take the Twolves total, for example - it was opened at 186.5 at Olympic yet Rio shows they opened at 183.5, which is where the number is now.
Don't get me wrong, I like Rio, but I don't see what the usefulness of this number is since in the example above you completely miss the 3 point move downward. Which of course is the only purpose for showing an opener in the first place, to gauge what kind of movement there has been.