is_author() is intended to test for an author query. Not likely to work here.
I think a better way to exclude an author from your posts loop is to just make sure they never make it to it. So initialize your loop with the following (that is, place this in your template before the loop begins):
A reference to The Squid and the Whale? Hehehe, heavens no.
I can’t make a claim for it being a reference to much of anything, but if it was it would probably be how life can take something strange, sidle up to you nice and friendly like, then hammer you upside the head with it.