Originally Posted by MugenNightmare
It's a nerf which they're testing (and should revert because it will make Hecarim ****ing useless!) so the text isn't updated.
I think he's talking about the actual cool-down duration numbers not showing in the upgrade scale. Of course he could definitely be talking about what you're talking about as well, but they way he phrased it as cooldown instead of lifestealing awesomeness makes me feel it's definitely just a tooltip error.
Edit 1: by the way, great find, it's the small details that get overlooked and never found.
~Summoner namora, of the lower case.