@Arx724 @Kaarme I stand corrected. I got as far as:
"due in part to their well-developed olfactory bulb and a large surface of olfactory mucosa, about 5.8 square centimetres (29⁄32 square inch) in area, which is about twice that of humans"
on the wikipedia article on cats, and stopped with an incorrect assumption.
The article on "cat senses" states:
"A domestic cat's sense of smell is 9-16 times as strong as humans'"
More fool me.
<stubborn> That said, he is a behemoth, not a cat, so who knows what his sense of smell is like.</stubborn>