How pointy were Elrond's ears?

[littlemanpoet]

Okay, this topic has probably been argued into the ground, but here goes anyway. [img]smilies/evil.gif[/img]

A quote on another thread got my mind boiling:

JRRT states that elven and human hroar, ie bodies, are genetically the same, hence possibility of interbreeding between these races. That's fea, the spirit/soul, which makes the difference. When elven fate is changed to human, the body stays as it was, fea changes...

If Elrond was half-elven, were his ears half pointy? What about Elros? What about Elros's son, Vardamir Nolimon?

And where the heck did this pointy eared notion come from? Where is it in Tolkien?