[quote=@Lord Wraith]
<Snipped quote by Cyrania>

I don't really see it as a 'skill issue's per say so much as that's the Kryptonian bio field provides a form of constant interference preventing any and all telepaths from getting in their noggins.
[/quote]

Huh, didn't know about this piece of lore. 

I'd kinda assumed Telepathy was linked to magic and so were both weaknesses for Superman.