Right, Google Earth allows 0 to 3 for exaggeration, and I use "1.5" as I got "actual" feeling like I climb up the real hill.
You know if you stand on a hill or a valley in the real world, you will feel the slope is somewhat harder than it's actual degrees, especially when you bike.
Cote de Maron (Stage 6, Cat 4 at 13.5km to go) looks like so flat on Google Earth without exaggeration (means number is "1"), but we watched the riders climbing bit harder on TV coverage.