I don't think it's true at all. Passive players, who there are more of in full ring by its nature, rely more on shown down pots. But, there are plenty of attacking full ring players with their green line above their blue. For example:
By
actionstan at 2007-11-21
I'm not clear that the equity adjusted number is all that meaningful beyond all in before the river. You can have all sorts of equity in the hand at some point and still call bad. I don't know. I do think that all-in before the river will tell you if you're getting you're money in good in big pots:
By
ActionStan at 2007-11-21