@shoc
If there's no difference between High and Blood Elves, then the same may be applied to Mag'har vs Green Orcs, Eredar vs Draenei, and so on. Blood Elves are Fel Corrupted, there is a difference.
I also think that people are vastly underestimating the longevity of the green eyes. Look at the orcs. It's been two or three generations since Mannoroth, and something around 12 years since the Third War. Yet, every single green Orc lineage remains green. Even someone like Thrall, who is a master of arguably a near exact opposite of Fel magic.