Did you read his comment ?

> I thought "Anathem" was Stephenson's best since Snowcrash.

Apparently that's a 'yes', since he has read Snowcrash.

I read it and commented before it was edited to include that bit about Anathem. The original post made no mention of reading any book.

Ah ok... I can't stand those 'silent edits' that make you look like a fool.

Yeah, it's bad form to alter a post in reaction to a critical comment, and not indicate there has been a change.