To be honest, I wasn't :) For those not familiar with terminology, they might think that "italics" represents both (because eg. most software would use one or the other if you click on the slanted "I"talic button), which is why I differentiated between "real" or not real italics.
And while I agree "oblique" is a more technical term, "slanted" is frequently used to mean the same thing, and is probably more understandable. Perhaps I am wrong and it isn't :)